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Boundary-Line user guide and technical specification

1. 8 1 ctn 8 8 Boundary Line files and 9 Complex polygons 10 guinem lll 10 Feature POSITION uyu uu 11 Feature atribute gl uuu lll ll lla E SASS E A 11 AVOCA CODGS P 11 Other 11 Unique identifiers for administrative unit link 11 2 EE 11 Boundary Line explalned UIIIIIILLIII IILI asss awaswawwuykawswaswwswsasawaawanaaykawsus 12 Relationships of administrative areas 12 Boundary Line principles and 16 AdimrinistratiV6 a Ga 16 NCCRUTIUIrz 16 sna 16 Ceremonial 17 D Sehed p PEDE 17 Divorce memi sciuri 17 EffeCtive Cate isi
2. Boundary Line user guide chapter 3 v1 18 09 2013 Crown copyright Page 14 of 94 Figure 3 2b an example of the Scottish directory and layered files Maplnfo district borough unitary district borough unitary ward european region ligue m uum UU scotland and wales const see note scotland and wales region see note NOTE Scotland and Wales files contain only Scottish information in the Scotland data folder and only Welsh information in the Wales data folder Figure 3 2c an example of the Welsh directory and layered files Maplnfo district_borough_unitary european_region high water 7777 Scotland and wales const see note scotand and wales region ses nale nitary_electoral_division westminster const NOTE Scotland and Wales files contain only Scottish information in the Scotland data folder and only Welsh information in the Wales data folder Boundary Line user guide chapter 3 v1 18 09 2013 Crown copyright Page 15 of 94 Boundary Line principles and features This following explains the representation of features in Boundary Line and describes various definitions and exceptions Administrative area A term used by Ordnance Survey to refer to all public administrative areas For the Boundary Line dataset the following are included under this term e n England e County e Unitary authority e Metropolitan district
3. 17 EX COPUOM ALC u n 17 Government Office Regions aa 19 Honorarytltles d onis eite POR OI PER RUE DU EISE 19 National 19 Government Statistical Service codes sss 19 c 20 Order Act or Statutory Instrument nana 20 Superseded date scania aganida asa eee aee a aaien e o ia iaaa aana aaa Naaien 20 GHariges E 20 Unarinexed areas octo etie Du D u k sus tsa 20 Unitary allioli uu uuu uuu Saa S 20 The coastline and associated items a 20 Boundary Line user guide contents v1 18 09 2013 Crown copyright Page 2 of 94 Chapter 4 Annexe A Annexe B Extent of the realm 20 FOROS OMG RT 21 Islands and rocks in the sea sse ene eee 22 Mean high water springs n n 22 Mean low water springs 22 Normal tidal limit 22 acm 22 Point 22 Seaw
4. NOTE 1 valid VALUE for PI range is 040000 to 999999 Boundary Line technical specification chapter 5 v1 18 09 2013 Crown copyright 78 of 94 Geometry Record SEOMETRY1 21 Field Position Format Content Description REC DESC 01 02 A2 21 Record descriptor GEOM ID 03 08 l6 Variable number For link cross reference from GEOM ID in Chain Record GTYPE 09 09 I 2 Defines as line geometry a link NUM COORD 10 13 l4 Variable number Number of coordinate pairs COORD 14 21 18 Variable number Easting offset to 0 1 m Y COORD 22 29 18 Variable number Northing offset to 0 1 m IQPLAN 30 30 A1 lt S gt Not used ATT_ID s 16 Variable number For links cross reference to ATT ID in Attribute Record CONT MARK Ju 11 0 No further records or 1 or continuation record follows EOR UT A1 96 Record terminator variable integer Record examples 21000001200020000000000040009 0000000000000000 0000010 21000002200020000000000048909 0000000000040009 0000020 21800002200120000200000050857 0000209600050905 0000235200051086 1 000000269100051180 0000298200051282 0000343600051455 0000371300051573 1 000000408800051761 0000429400051866 0000457600052137 0000472600052285 1 000000492400052503 8000020 s sa s eNews zer EIER ress berau o nea rm 12345678901234567890123456789012345678901234567890123456789012345678901234567890 PPP Template NOTE 1 X COORD Y COORD
5. See chapter 3 Relationships of administrative areas for a hierarchical relationship of the boundaries contained with these files and directories Boundary Line technical specification chapter 3 v1 18 09 2013 Crown copyright Page 59 of 94 Chapter 4 NTF explained For convenience BS 7567 National Transfer Format v2 0 level 3 is referred to as NTF The purpose of this chapter is to e provide a brief description of the presentation of Boundary Line in the NTF transfer format and e provide details to enable Boundary Line files in NTF to be understood and processed in GIS application software The term data structure refers to the organisation and sequence of the records in the data file and not to the geographical topology of the data An overview of Boundary Line in NTF Boundary Line data is supplied in the British Standard national format namely NTF and is transferred in level 3 as variable length records The British Standard for NTF stipulates the following for level 3 This level supports a variety of data models that may include network data polygons semantic relationships and complex features This level is designed for e transferring basic geometry and simple features through the use of geometry and feature records e relating basic geometrical and topological elements to one or more features through the use of chain records combining features to form complex features through the use of collection and
6. D is found in the Attribute Record for link Tidal and other coastal information See also mean high water springs and mean low water springs in chapter 3 of the Boundary Line user guide EOR the external bounding line of the Boundary Line dataset is the extent of the realm NOTE to display the EOH both mean high water MHW and another type of boundary for example European electoral region or Westminster constituency need to be displayed together Boundary Line technical specification chapter 4 v1 18 09 2013 Crown copyright Page 63 of 94 MHW mean high water springs mark is shown as continuous lines within each delivered dataset The lines do not interact with the administrative area lines Mean high water springs mark is represented in Boundary Line by a continuous link feature with feature code 0071 Mean low water springs mark is not shown although it is generally coincident with the EOR The area of non inland is referenced within each administrative unit using the NA attribute Complex polygons Administrative units wholly surrounding others of the same type are examples of polygons with holes in them These are known as complex polygons The Complex Polygon Records CPOLY establish the connection between the single containing polygon and the contained polygons The Complex Polygon Record CPOLY is referenced by the Collection of Features Record COLLECT for the administrative area of which they ar
7. 54 Example of a MID file record L 54 Example of a file header County sse 54 angana an EA A A 55 Example of a MIF file header Mean high 55 Example of a MID file record Mean high 55 Example of a TAB file record Mean high 55 File names for layered MID MIF and TAB sse emnes 56 Directory names for nested MID MIF and 56 Chapter 3 EE 57 An overview of Boundary Line in ESRI 57 Structure of Boundary Line in Shapefile U L n 57 Le 57 Link features MHW M 57 rero o DEWEY 57 Shapefile table 58 Example field record for Shapefile County sse 58 Example field record for Shapefile Mean high 59 File names for layered Shapefile sse 59 Directory names for nested U a 59 Chapter 4 NEEF explalliBg ueteris M DA c M DIL Dal Ed 60 An overview of Boundary Line in 60 Conventions used in this technical specification essere 60 Version managemen esena nnne eren nnns un en nnne nenne 61 Producti vorio u u uu
8. 0 0 0 0 606 66 Boundary Line user guide annexe D v1 18 09 2013 Crown copyright Page 39 of 94 NUTS 1 East Midlands NUTS 2 Derbyshire and Nottinghamshire NUTS 3 Derby East Derbyshire South and West Derbyshire Nottingham North Nottinghamshire South Nottinghamshire LAU 1 areas Derby Bolsover Chesterfield North East Derbyshire Amber Valley Derbyshire Dales Erewash High Peak South Derbyshire Nottingham Ashfield Bassetlaw Mansfield Newark and Sherwood Broxtowe Gedling Rushcliffe Leicestershire Rutland and Northamptonshire Leicester Leicestershire CC and Rutland Northamptonshire Leicester Blaby Charnwood Harborough Hinckley and Bosworth Melton North West Leicestershire Oadby and Wigston Rutland Corby Daventry East Northamptonshire Kettering Northampton South Northamptonshire Wellingborough London Lincolnshire Inner London Lincolnshire Inner London West Inner London East Boston East Lindsey Lincoln North Kesteven South Holland South Kesteven West Lindsey Camden City of London Hammersmith and Fulham Kensington and Chelsea Wandsworth Westminster Hackney Haringey Islington Lambeth Newham Southwark Lewisham Tower Hamlets Hwwww i l l l l D D l D D Dl D D D D D D D D l D D Dl D l D D d d SI Boundary Line user guide annexe D v1 18
9. County Durham Darlington Northumberland Hartlepool Gateshead metropolitan district Middlesbrough Newcastle upon Tyne metropolitan district Redcar and Cleveland North Tyneside metropolitan district Stockton on Tees South Tyneside metropolitan district Sunderland metropolitan district Scotland Angus West Dunbartonshire Clackmannanshire West Lothian Dundee City Highland East Ayrshire Moray East Dunbartonshire Orkney Islands East Renfrewshire Na h Eileanan an lar Falkirk Argyll and Bute Glasgow City Aberdeenshire Inverclyde Fife Midlothian Aberdeen city North Lanarkshire City of Edinburgh Perth and Kinross East Lothian Renfrewshire Shetland Islands Scottish Borders North Ayrshire South Lanarkshire Dumfries and Galloway Stirling South Ayrshire South East Buckinghamshire county Milton Keynes East Sussex county Reading Hampshire county Slough Kent county The City of Brighton and Hove Oxfordshire county West Berkshire Surrey county Windsor and Maidenhead West Sussex county Wokingham Bracknell Forest Isle of Wight City of Southampton City of Portsmouth Medway South West Dorset county Bournemouth Gloucestershire county City of Bristol Somerset county Poole Wiltshire South Gloucestershire Devon county Swindon Cornwall Torbay Isles of Scilly North Somerset Bath and North East Somerset City of Plymouth Boundary L
10. Boundary Line has been created as a more generalised set of administrative and electoral boundaries for the whole of Great Britain It has been digitised against Ordnance Survey generalised 1 10 000 scale OS Landplan mapping The process of generalising for 1 10 000 scale mapping may have caused certain features to be moved from their true ground position for the purposes of map clarity The result being that Boundary Line and large scale boundaries will not always be coincident Feature attribute data An attribute is the descriptive characteristic of a feature that is non spatial element In Ordnance Survey map data terms an attribute can be a feature type these are character codes or a distinctive name number or code for example Bassett Ward or 145 232 hectares Attribute codes relevant to NTF are fully described in chapter 4 of the technical specification Area codes Each administrative unit is classified by means of an area code AC These area codes are allocated when each feature is initially interpreted and captured from source This means that a county is distinguished from a ward by the area code allocated to it The polygon features can be classified by tracing their relationships to administrative units Consequently links can be classified by tracing their relationships to polygons These area codes are all listed in chapter 2 of the technical specification Other attributes It is possible with appropriate software
11. e District Civil parish NOTE depicted if appropriate notification has been received Not all parishes have councils e European electoral region e Parliamentary Westminster constituency e Electoral division of county or unitary authority e Ward of district metropolitan district London borough unitary authority e London borough including the county of the City of London e Greater London Authority and e Greater London Authority Assembly constituency n Wales e Unitary authority e Community NOTE depicted if appropriate notification has been received e European electoral region e Parliamentary Westminster constituency e Electoral division of unitary authority e Welsh Assembly constituency and e Welsh Assembly electoral region e In Scotland e Unitary authority e European electoral region e Parliamentary Westminster constituency e Ward of unitary authority e Scottish parliamentary constituency and e Scottish Parliament electoral region Area values Area values exist for every polygon in Boundary Line area values are quoted to the current Department for Communities and Local Government DCLG specification of 0 001 hectare The value is subject to the inherited accuracies of the generalised 1 10 000 scale published mapping used as the source for Boundary Line Boundary A boundary is the limit of a preset and established area whose limit is determined by one or more lines For examp
12. Cross section Level of the sea at hlgh water Level of the sea at low water In this figure the extent of the realm EOR follows mean low water crossing the estuaries at LWL Foreshore The foreshore is taken to be the area of land between mean high water springs mark and the extent of the realm which will include e tidal water within a seaward extension and e tidal water above Point B Figure 3 5a to the normal tidal limit NTL together with the area between mean high water springs mark and the edge of the channel at mean low water springs Mean high water springs mark is represented in Boundary Line by a continuous link feature with feature code 0071 Mean low water springs mark is not shown although it is generally coincident with the EOR The area of non inland is referenced within each administrative unit using the NA attribute Boundary Line user guide chapter 3 v1 18 09 2013 Crown copyright 21 of 94 Islands and rocks in the sea The following rules govern the representation in Boundary Line of offshore islands and rocks in the sea e offshore rocks and islands will be shown if 0 4 hectares or more in area at high tide e offshore islands with buildings will always be shown irrespective of size Offshore islands or rocks will not be shown if they are beyond the defined extent of the realm irrespective of size or covered at high tide If an offshore island or rock is shown
13. North Warwickshire Nuneaton and Bedworth Rugby Stratford on Avon Warwick Shropshire and Staffordshire Telford and Wrekin Telford and Wrekin Shropshire Shropshire Stoke on Trent Staffordshire CC Stoke on Trent Cannock Chase East Staffordshire Lichfield Newcastle under Lyme South Staffordshire Stafford Staffordshire Moorlands Tamworth Yorkshire and The Humber West Midlands East Yorkshire and North Lincolnshire Birmingham Solihull Coventry Dudley and Sandwell Walsall and Wolverhampton Kingston upon Hull city of East Riding of Yorkshire North and North East Lincolnshire Birmingham Solihull Coventry Dudley Sandwell Walsall Wolverhampton Kingston upon Hull city of East Riding of Yorkshire North East Lincolnshire North Lincolnshire GHkww D l l l D l l D D Dl D d D D D D D l d D d i d I Boundary Line user guide annexe D v1 18 09 2013 Crown copyright Page 43 of 94 NUTS 1 NUTS 2 NUTS 3 LAU 1 areas North Yorkshire York York North Yorkshire CC Craven Hambleton Harrogate Richmondshire Ryedale Scarborough Selby South Yorkshire Barnsley Doncaster and Barnsley Rotherham Doncaster Rotherham Sheffield Sheffield West Yorkshire Bradford Bradford Leeds Leeds Calderdale Kirklees and Calder Wakefield Kirklees Wakefield H www l l l l l l l
14. The data comprises three levels of features 1 the administrative unit has attributes that include the administrative unit s name and GSS code The administrative unit feature is classified by means of a feature type It also has explicit pointers to the polygons that define its area 2 the polygon includes attributes that define its area value it also has explicit pointers to the links that chains or makes up its edge and may have pointers to holes within the area and 3 the links have a geometry that defines their shape Administrative units polygons and links are assigned unique identifiers for each release of Boundary Line Boundary Line data structure Real world administrative and voting units are modelled and named and have explicit pointers to the polygons that define their area of influence Boundary Line NTF data is defined geometrically as a structured link and polygon database Linear boundary features are represented as links a series of connected coordinated points Chains of one or more links form explicit closed polygons Each NTF polygon has explicit pointers to the links that represent its boundaries NTF link geometry and polygon chains within the data model determine the geometric positional characteristics of the data Each real world administrative or electoral voting unit is classified by means of an area code The polygons are classified indirectly by the administrative or electoral voting unit collectio
15. for you to add other names or values of your own choice as attributes of features Unique identifiers for administrative unit link and polygon There are three identifiers in Boundary Line that help you identify features and which are provided to create consistent references between successive releases of Boundary Line data They are unique within each feature type throughout the whole dataset and maintained through successive annual updates See chapter 2 in the technical specification for other attributes and ID information These identifiers are never modified only created or deleted If a feature is deleted from the Boundary Line database then the identifier ceases to exist ADMIN AREA GLOBAL LINK 1 LK GLOBAL POLYGON 10 PI Text There is no direct cartographic text in Boundary Line Names area values and GSS codes are held as attributes Boundary Line user guide chapter 2 v1 18 09 2013 Crown copyright Page 11 of 94 Chapter3 Boundary Line explained Relationships of administrative areas The Boundary Line product supplies the administrative area relationships explicitly within the COLLECT record A district is a division of a county a civil parish is a division of a district A county is divided for voting purposes into electoral divisions EDs and a district is divided for voting purposes into district wards With the introduction of unitary authorities there are now two and three tier local gov
16. it will be contained within all the relevant administrative unit collections Mean high water springs The mean high water springs mark is shown to NTL Areas of salt marsh mudflats and so on often have very complicated tide lines For ease of digitising and to reduce data volumes mean high water may be generalised in these areas not Scotland Mean high water springs mark is represented in Boundary Line by a continuous link feature with feature code 0071 Mean high water springs mark is subject to continuous change but the captured alignment of a tide line is a snapshot on one day It is not practical to revise tide lines very frequently Mean low water springs Mean low water springs mark is shown as the extent of the realm except when contained within a seaward extension when it is then omitted Banks of sand mud shingle or rock separated from the main line of mean low water springs and covered at high tide are not shown When there are large areas of these banks separated from the main foreshore by narrow channels the channels are ignored and the whole bounded by mean low water springs The extension of the line of mean low water springs into a channel above Point B becomes edge of channel and is not shown Mean low water springs mark and hence EOR is subject to continuous change but the captured alignment of a tide line is a snapshot on one day It is not practical to revise tide lines very frequently
17. nennen 83 Attribute Description Record ATTDESC 40 sse 84 Code List Record CODELIST 42 85 Volume Termination Record VOLTERM 99 sse 86 GOS SAY occas ucc eU uU EI E LL IE 87 v1 18 09 2013 Boundary Line technical specification contents v1 18 09 2013 Crown copyright Page 49 of 94 Introduction Purpose of this specification and disclaimer This is the technical specification hereafter referred to as the specification applicable to Boundary Line hereafter referred to as the product We may change the information in this specification at any time We do not accept responsibility for the content of any third party websites referenced in or accessed through this guide or through the Ordnance Survey website Copyright in this specification This guide is Crown copyright 2013 You may copy or distribute any part of this specification to support the use of OS OpenData including for your personal use use in your organisation or business or for use with or incorporation in your product or application Boundary Line technical specification introduction v1 18 09 2013 Crown copyright Page 50 of 94 Chapter1 Product contents Source of Boundary Line The main data sources used for the creation of Boundary Line are Ordnance Survey s 1 10 000 scale boundary record sheets and OS Landplan digital data Update currency Boundar
18. D D l D l D D i D D D D D D D l d d D D D d i I Boundary Line user guide annexe D v1 18 09 2013 Crown copyright 44 of 94 Annexe E Case studies Creating the right environment data management The Welsh Environmental Data Interface WENDI Agriculture forestry and woodland account for 90 of Wales land use generating a wealth of insightful statistical information The National Assembly for Wales uses this data to inform policy assist decision making and help deliver a wide range of services to rural communities Sharing data across the NHS to improve patient services NHS North West was established under government policy to strengthen primary care trusts PCTs and give GPs greater ability to commission or purchase health services directly for their patients The organisation replaced the three former strategic health authorities in Cumbria and Lancashire Cheshire and Merseyside and Greater Manchester Association of Greater Manchester PCTs is taking forward a data analysis and reporting tool called the TIS Analyser which was developed by Greater Manchester health organisations as part of the Tactical Information Service TIS Read more at http www ordnancesurvey co uk oswebsite business markets htm Boundary Line user guide annexe E v1 18 09 2013 Crown copyright Page 45 of 94 Annexe F Metadata INSPIRE compliant metadata in conjunction with UK Location Programme is available to access as either e
19. Figure 3 1a relationships of administrative areas for England nested Local Local i Administrative area 1 government ii government voting area ii voting area Nested England Electoral division F 1 Nested 11 Electoral division Nested London boroughs Nested and metropolitan County district parts of parts of England England Unitary authority parts of England Nested NOTE Some Dist s UA s have or are non Parished Areas Nested Nested Nested i Ward I Civil parish Nested Civil parish some metropolitan districts only Civil parish Ward Figure 3 1b relationships of administrative areas for Wales nested Voting area u Administrative area Nested Wales Nested Electoral division Unitary authority Nested Community f Community Boundary Line user guide chapter 3 v1 18 09 2013 Crown copyright Page 13 of 94 Figure 3 1c relationships of administrative areas for Scotland nested Voting area x Administrative area Europe Nested Scotland Nested Unitary authority Figure 3 2a an example of the English directory and layered files Maplnfo England s county electoral division district borough unitary district borough unitary ward greater london const water i i junitary electoral division jwestminster
20. Line Technical specification Contents Section Page no 0 50 Purpose of this specification and 50 Copyright in this specification U enne nennen nnns nennen 50 Chapter 1 PROGUCUCONMIGING e M 51 Source of 51 Update CUNGNC Y uu uu CL LEOTE 51 Superseded 51 Government Statistical Service GSS 51 Tide Enim 51 51 Complete engss e MA 51 Boundary Line data properties nennen nnns 52 Boundary Line data 52 Chapter 2 MID MIF e 53 An overview of Boundary Line formats 53 Mapinfo m TL ni 53 TAB u u L 53 Structure of Boundary Line in MapInfo formats eene 53 XLSNCIAEMRM 53 Linieteatures MEW 53 Coordinate SySl8lf 53 MID MIF and TAB table
21. Oct 2013 N A N A Amend UA bdy LANARKSHIRE Wales SI year SI number Unitary Authority Operative date Comments if applicable CARDIFF MERTHYR TYDFIL POWYS RHONDDA CYNON 15 Nov 2012 2011 2987 I Ps ang TAF VALE OF GLAMORGAN BLAENAU GWENT 01 Oct 2013 N A N A Amend UA bdy CAERPHILLY 01 Oct 2013 N A N A Amend UA bdy CARDIFF 01 Oct 2013 N A N A Amend UA bdy CARMARTHENSHIRE 01 Oct 2013 N A N A Amend UA bdy CEREDIGION 01 Oct 2013 N A N A Amend UA bdy CONWY 01 Oct 2013 N A N A Amend UA bdy DENBIGHSHIRE 01 Oct 2013 N A N A Amend UA bdy GWYNEDD 01 Oct 2013 N A N A Amend UA bdy MERTHYR TYDFIL 01 Oct 2013 N A N A Amend UA bdy MONMOUTHSHIRE 01 Oct 2013 N A N A Amend UA bdy NEATH PORT TALBOT 01 Oct 2013 N A N A Amend UA bdy NEWPORT 01 Oct 2013 N A N A Amend UA bdy PEMBROKESHIRE 01 Oct 2013 N A N A Amend UA bdy POWYS 01 Oct 2013 N A N A Amend UA bdy RHONDDA CYNON 01 Oct 2013 N A N A Amend UA bdy Boundary Line user guide annexe A v1 18 09 2013 Crown copyright Page 26 of 94 TAFF SWANSEA 01 Oct 2013 N A N A Amend UA bdy TORFAEN 01 Oct 2013 N A N A Amend UA bdy Boundary Line user guide annexe v1 18 09 2018 Crown copyright 27 of 94 Changes not incorporated into the October 2013 Boundary Line update Residual Statutory Instruments Sls and non Sls England T SI SI District Unitary Authority County ILondon Borough opor wa
22. Scottish parliamentary electoral region Welsh Assembly electoral region Westminster constituency authority ED as appropriate civil parish where appropriate together with community in Wales parish where appropriate parliamentary constituency constituency European region The named European region The following table represent the named files contained in Boundary Line October 2013 specification A complete dataset of Great Britain has 830 named files made up of 27 county files e 110 authority files e 632 Westminster constituency files e 11 European region files e 36 metropolitan district files e 1 Greater London Authority file e 8 Scottish parliamentary electoral region files and e 5 Welsh Assembly electoral region files The dataset for England has 662 named files made up of 27 county files e 56 unitary files e 533 Westminster constituency files e 9 European region files e 36 metropolitan district files and e 1 Greater London Authority file Boundary Line user guide chapter 2 v1 18 09 2013 Crown copyright Page 9 of 94 Possible sub level of boundaries within the named file The named metropolitan district metropolitan district ward civil The Greater London Authority Greater London Authority Assembly constituency London borough London borough ward The named Scottish parliamentary electoral region Scottish The named Welsh Assembly electoral region Wel
23. This attribute is conveyed in the Attribute Record for collection of features and is a unique identifier for each administrative unit Each AI attribute is unique to the entire Boundary Line dataset AC AREA CODE A code allocated by Ordnance Survey to indicate the administrative or voting area type This is allocated to all administrative or voting areas The current values are given below and also include codes for future areas NOTE this list should be treated as dynamic as other types of boundaries may be added in the future Name Code Civil parish or community CPC County CTY County electoral division CED Boundary Line technical specification chapter 4 v1 18 09 2013 Crown copyright Page 64 of 94 District DIS District ward DIW European region EUR Greater London Authority GLA Greater London Authority Assembly constituency London borough LBO London borough ward LBW Metropolitan county Metropolitan district MTD Metropolitan district ward MTW Nation NAT Non civil parish or community NCP Realm RLM Scottish Parliament constituency SPC Scottish Parliament electoral region SPE Sea SEA Unitary authority UTA Unitary authority ward UTW Unitary authority electoral division UTE Welsh Assembly constituency WAC Welsh Assembly electoral region WAE Westminster constituency WMC FC FEAT CODE The use of feature codes is red
24. XML format on the main Ordnance Survey website or e XML and HTML format on the data gov uk website as Additional Links GEMINI2 records Boundary Line user guide annexe F v1 18 09 2013 Crown copyright 46 of 94 AnnexeG Product and service performance report form Ordnance Survey welcomes feedback from its customers about Boundary Line If you would like to share your thoughts with us please print a copy of this form and when completed post or fax it to the address below YOUrNaME PO 0 erede M U Adres Quotation or order reference n nsn asnan usan Please record your comments or feedback in the space below We will acknowledge receipt of your form within three 3 working days and provide you with a full reply or a status report within 21 working days If you are posting this form please send it to Boundary Line Product Manager Ordnance Survey Adanac Drive SOUTHAMPTON SO16 0AS If you wish to return it by fax please dial 44 0 8450 990494 Any personal information that you supply with this report form will be used by Ordnance Survey only in the improvement of its products and services It will not be made available to third parties Boundary Line user guide annexe G v1 18 09 2013 Crown copyright Page 47 of 94 Boundary
25. complex polygon records e using text records both to relate text strings to features and cartographic output and e referencing and positioning external features for example raster data the record structure at this level may also be defined to be compatible with data in levels 1 and 2 The governing body for the industry standard NTF is the British Standards Institution BSI Their address is British Standards Institution 389 Chiswick High Road LONDON W4 4AL Phone 44 0 20 8996 9001 Fax 44 0 20 8996 7001 NOTE full details of the British Standard can be accessed through the British Standards Institution s website at www bsi global com Conventions used in this technical specification Certain conventions are adopted as an aid to interpretation In some cases the convention is dropped where the context is self evident Square brackets are placed around record names for example VOLHDREC Curly brackets denote field names for example REC_DESC is the Record Descriptor field 90 A two digit number following square brackets denotes the record descriptor which uniquely identifies the record name between the brackets S This represents the space character ASCII code 32 3S This denotes three successive space characters 96 This is the percentage character ASCII code 37 Boundary Line technical specification chapter 4 v1 18 09 2013 Crown copyright Page 60 of 94 Version management Pr
26. consist of a number of files with extensions such as DAT ID MAP and TAB All of these files need to be present and kept together for the table to work Structure of Boundary Line in Maplnfo formats Area features Area features are polygons with attributes added Link features Links represent all linear features that is boundaries extent of the realm and mean high water springs mark All links are broken when they intersect with one another The first and last coordinate pairs in a link correspond exactly with the end coordinates of the adjoining link s Links may comprise up to several thousand line segments Coordinate system The coordinate system is National Grid NG The National Grid coordinates are to a resolution of 0 1 metre This is the resolution of the source data Boundary Line technical specification chapter 2 v1 18 09 2013 Crown copyright 53 of 94 MID MIF and TAB table structures Title Type Title Type Name Char 60 Feature Code Char 4 Area_ Code Char 3 Feature Description Char 21 Area_Description Char 50 File Name Char 50 File Name Char 50 Feature Serial Number Integer Feature Serial Number Integer Global Link ID Integer Collection Serial Number Integer Global Polygon ID Integer Admin Unit ID Integer Census Code Char 9 Hectares Decimal 12 3 Non Inland Area Decimal 12 3 Area Type Code Char 2 Area Type Description Char 25 Non Area Type Code Char
27. file An organised collection of related records The records on a file may be related by a specific purpose format or data source and the records may or may not be arranged in sequence file may be made up of records fields words bytes characters or bits font The style of text character used format The specified arrangement of data for example the layout of a printed document or the arrangement of the parts of a computer instruction or the arrangement of data in a record A specification that defines the order in which data is stored or a description of the way data is held in a file record geographical information system GIS A system for capturing storing checking integrating analysing and displaying data that is spatially referenced to the Earth This is normally considered to involve a spatially referenced computer database and appropriate applications software header See map header implicit Data that is not directly described in a digital form The relationship between two adjacent objects may be implicit in that they are within a specified distance of each other To determine this further processing is required layer A subset of digital map data selected on a basis other than position For example one layer might consist of all features relating to counties and another to wards Also known as a level level A level corresponds to a single type of administrative unit for example a ward or a district
28. is a grouping of Welsh Assembly constituencies Great Britain is divided into European regions Scotland Wales and nine English regions for voting purposes to elect members MEPs to the European Parliament England Scotland and Wales are divided into parliamentary constituencies for voting purposes to elect members MPs to the Westminster Parliament Parliamentary constituencies are made up of combinations of wards or electoral divisions in Wales Boundary Line data is output in two structures e Nested The data is supplied by named files all the named files include all of the other sub levels of electoral boundaries that belong under that high level administration for example a county file will have the named county district district ward civil parish and county ED contained within Unitary authorities will have named unitary authority unitary authority ward or unitary authority ED as appropriate civil parish where appropriate together with community in Wales The nested structure is available in NTF ESRI Shapefile and MapInfo MID MIF and TAB e Layered This is a simplified file structure supplying the boundaries as individual files for example the county file contains only counties and the unitary authorities file contains only unitary authorities The layered structure is only available in ESRI Shapefile and MapInfo MID MIF and TAB Boundary Line user guide chapter 3 v1 18 09 2013 Crown copyright Page 12 of 94
29. links for polygon within file CGEOM 10 and DIR iterate this number of times Cross reference to GEOM in Geometry Record for link Direction start to end or direction end to start No further records or continuation record follows Record terminator 2400007300120000321000012100001110000101000009100003110000591000064100006311 000000621000060100006110 ele deseo E eau see massas sies pp cr ocre PEE 12345678901234567890123456789012345678901234567890123456789012345678901234567890 Template NOTE Continuation Record s CONTREC commence with the record descriptor 00 Boundary Line technical specification chapter 5 v1 18 09 2013 Crown copyright Page 80 of 94 Polygon Record POLYGON 31 Field Position Format Content Description 01 02 A2 31 Record descriptor POLY_ID 03 08 16 Variable number Polygon ID unique in file for administrative unit Reference to PART 10 in Collect Record that is preceded by a value of 31 in REC DESC CHAIN ID 09 14 16 Variable number Unique in file ID for Chain Cross reference to CHAIN_ID in Chain Record GEOM_ID 15 20 16 000000 NUM 21 22 2 01 The number of attribute identifiers that follow ATT_ID 23 28 16 Variable number Cross reference to ATT_ID in Attribute Record CONT_MARK 29 29 l1 0 No further records EOR 30 30 A1 96 Record terminator Record example 31800463800463000000018004630 gels ates ds og tec wl oes i
30. purposes of Ordnance Survey only so that polygons can be created River Mersey Certain sections of the boundary between the former county of Merseyside containing the metropolitan districts of Liverpool and Wirral and in the former county of Cheshire now Cheshire West and Chester and Halton have never been determined For the purposes of Boundary Line and by agreement with DCLG 1 the district boundaries of those parts of Cheshire West and Chester that abut the Mersey estuary have been made coincident with the limits of the relevant districts wards at the centre of the channel at high water CCHW Boundary Line user guide chapter 3 v1 18 09 2013 Crown copyright 18 of 94 2 the undetermined part of the southern boundary of Liverpool district in the Mersey estuary has been made coincident with the limits of that district s wards at the CCHW 3 theundetermined part of the county boundary between the former county of Merseyside and the former county of Cheshire in that part of the estuary between the new Cheshire West and Chester and Liverpool has been made coincident with the limits of the wards at the CCHW and 4 the northern limit of the parliamentary constituency of Ellesmere Port and Neston is the mean high water mark on the south side of the Mersey estuary The wards of Windsor Castle These wards which include the personal apartments of the Sovereign have no relevance to the election of councillors to elect
31. refer to a non spatial qualification of a spatially referenced entity For example a name or descriptive code indicating what an entity represents or how it should be portrayed attribute class A specific group of attributes for example those describing measure serviceability structure or composition attribute code An alphanumeric identifier for an attribute type attribute value A specific quality or quantity assigned to an attribute boundary Boundaries define the areas of the various national local government and some European authorities CAD Computer aided design census code Identifies the Government Statistical Service GSS codes that were released in Boundary Line in October 2010 centroid The position of the centre of gravity of an entity often used to reference polygons character A distinctive mark an inscribed letter one of a set of writing symbols chain A closed loop of links bounding a polygon character string A one dimensional array of characters held either in memory or in another storage medium Boundary Line technical specification annexe v1 18 09 2013 Crown copyright Page 87 of 94 coding Allocation of a feature code to a feature being created from constituent construction data points and or segments with optional linking to an existing feature of the same feature code compact disc read only memory CD ROM A data storage medium A 12 cm disc read by laser coordinat
32. reference to ATT_ID in Geometry record VAL TYPE 09 10 A2 LK Mnemonic for GLOBAL LINK ID attribute VALUE 11 20 110 See note 1 Unique identifier for link VAL_TYPE 21 22 A2 FC see note 3 below Mnemonic for FEAT CODE attribute optional VALUE 23 26 4 See notes 2 and 3 below Feature code optional CONT MARK 27 27 11 0 No further records EOR 28 28 A1 96 Record terminator Record example 14800044LK0000000000FC00710 14800045LK00001509600 a tata ides uec act Denm e m nimm OMe een 12345678901234567890123456789012345678901234567890123456789012345678901234567890 TT rcp eaa sa prp PER as sai Template NOTE 1 valid VALUE for LK range is 0000040000 to 9999999999 NOTE 2 valid VALUE for FC range is 0071 NOTE 3 where optional fields are not present CONT MARK and EOF fields will be in positions 21 and 22 Attribute Record ATTREC 14 for Collection of Features Record COLLECT 34 variable integer Record examples Field Position Format Content Description REC DESC 01 02 A2 14 Record descriptor ATT ID 03 08 16 Variable number Unique in file Cross reference to ATT_ID in Collect Record VAL_TYPE 09 10 A2 Al Mnemonic for ADMIN AREA ID attribute VALUE 11 16 16 note 1 below Unique in dataset number that is the Admin area ID 000000 for non areas VAL TYPE 17 18 A2 NA Mnemonic for NON_INLAND_AREA VALUE
33. some time in the future Effective date These are the dates on which an Act Order or Statutory Instruments are effective They may or may not be the same as the operative date or the appointed day or days The term is particularly applied to parliamentary Westminster constituency changes that are effective at the date of the next general election after the operation of the order making change This is the effective date that is the date of the proclamation dissolving an existing Parliament and calling a new Parliament Exception areas The following are specific exceptions to the normal rules Greater London and the metropolitan counties e Greater London covers the area of the 32 London boroughs plus the City and county of the City of London e Greater London is no longer a county The Greater London Authority which has no authority over the autonomous London boroughs is held as one named file with all of the sub levels of boundary within it e The London boroughs and the City and county of the City of London have been classified as London boroughs The metropolitan districts within the former metropolitan counties disbanded in 1985 are classified as metropolitan districts Boundary Line user guide chapter 3 v1 18 09 2013 Crown copyright Page 17 of 94 e Greater Manchester e Merseyside e South Yorkshire e West Yorkshire e Tyne and Wear and e West Midlands The Inner and Middle Temples The places know
34. structured data also contains topological information defining the relationships between features and objects terminator A character character string field or record used to signal the end of a record or section or volume or database topographic database A database holding data relating to physical features and boundaries on the surface of the Earth topography The study of the physical features of the Earth A topographic map s principal purpose is to portray and identify the features of the Earth topology The study of the properties of a geometric figure that are not dependant on position such as connectivity and relationships between lines nodes and polygons transfer format The format used to transfer data between computer systems In general usage this can refer not only to the organisation of data but also to the associated information such as attribute codes which are required in order to successfully complete the transfer transfer medium The physical medium on which digital data is transferred from one computer system to another For example CD ROM transfer set A specific NTF term for the data together with its supporting information which the customer receives update The process of adding to and revising existing digital map data to take account of change Boundary Line technical specification annexe v1 18 09 2013 Crown copyright Page 93 of 94 vector A straight line joining two data points
35. the range of values in the dataset specification Format consistency The physical structure syntax how closely the data stored and delivered fits the database schema and agreed supply formats Topological consistency The explicit topological references between features connectivity according to specification Positional Accuracy of the Absolute accuracy How closely the coordinates of a point in the accuracy position of dataset agree with the coordinates of the features same point on the ground in the British National Grid reference system Relative accuracy Positional consistency of a data point or feature in relation to other local data points or features within the same or another reference dataset Geometric fidelity The trueness of features to the shapes and alignments of the objects they represent Temporal Accuracy of Temporal How well ordered events are recorded in the accuracy temporal consistency dataset life cycles E and Temporal validity Validity of data with respect to time the relationships of currency amount of real world change that has been features incorporated in the dataset that is scheduled for capture under current specifications Thematic Classification of Classification How accurately the attributes within the accuracy features and their correctness dataset record the information about attribute attributes objects accuracy When testing the data acc
36. vector data Positional data in the form of coordinates of the ends of line segments points text positions and so on volume A physical unit of the transfer medium that is a single disk a single cartridge or a single tape l l l l D D D D D l l i D D l l D D l i D D l D l D l D D D i SI Boundary Line technical specification annexe v1 18 09 2013 Crown copyright Page 94 of 94
37. westminster const westminster const unitary electoral division westminster const Directory names for nested MID MIF and TAB England Scotland Wales County European Region European Region European Region Scottish Parliamentary Electoral Region Unitary Authority London Administration Unitary Authority Welsh Assembly Electoral Region Metropolitan District Westminster Constituency Westminster Constituency Unitary Authority Westminster Consituency NOTE see the user guide chapter 3 Relationships of administrative areas for a hierarchical relationship of the boundaries contained with these files and directories Boundary Line technical specification chapter 2 v1 18 09 2013 Crown copyright 56 of 94 Chapter3 ESRI Shapefile An overview of Boundary Line in ESRI Shapefile ESRI Shapefiles are a simple non topological format for storing the geometric location and attribute information of geographic features A Shapefile is one of the spatial data formats that you can work with in ArcGIS The Shapefile format defines the geometry and attributes of geographically referenced features in as many as five files with specific file extensions that should be stored in the same project workspace They are shp the file that stores the feature geometry shx the file that stores the index of the feature geometry dbf the dBASE file that stores the attribute information of features When a Shapefile is add
38. 0 0000000666 Boundary Line technical specification chapter 4 v1 18 09 2013 Crown copyright 69 of 94 05 FEATURE CLASSIFICATION RECORD 07 SECTION HEADER RECORD File 1 data 99 VOLUME TERMINATION RECORD 01 VOLUME HEADER RECORD 01 02 DATABASE HEADER RECORD 40 ATTRIBUTE DESCRIPTION RECORD 05 FEATURE CLASSIFICATION RECORD 07 SECTION HEADER RECORD File 2 data 99 VOLUME TERMINATION RECORD and so File n data 99 VOLUME TERMINATION RECORD 99 Of Transfer Set0 0 0 0000000006 66 Boundary Line technical specification chapter 4 v1 18 09 2013 Crown copyright Page 70 of 94 Chapter 5 Record structures for the transfer of Boundary Line in NTF NTF record list This list comprises the valid record types used in the Boundary Line NTF transfer set Descriptor 01 02 05 07 14 21 23 24 31 33 34 40 42 99 Description Volume Header Record defines the donor and data type Database Header Record transfers data about the database Feature Classification Record defines data classifications Section Header Record coordinate and structure types unit scale factors and so on Attribute Record defines the attributes for link name and polygon records Two dimensional Geometry Record defines the two dimensional geometry for a link Line Record defines all of the line inform
39. 0027053400270434002703340027023400270134 0026003400259934002598340025973400259634 0025023400250134002500340024993400245534 00245034002449010029730 lares Liers etna Lone Dunes m e eee ds 5678901234567890123456789012345678901234 al sx eel ceed acl nct den o om Es Template NOTE Continuation Record s CONTREC commence with the record descriptor 00 0028673400286634002865340028641 0027093400270834002707340027061 0027003400269934002698340026011 0025953400250534002504340025031 0024543400245334002452340024511 oe z Z AO ecu PE 567890123456789012345678901234567890 ae ew ex wl Boundary Line technical specification chapter 5 v1 18 09 2013 Crown copyright Page 83 of 94 Attribute Description Record ATTDESC 40 Field Position Format Content Description 01 02 A2 40 Record descriptor 03 04 A2 See table below Attribute mnemonic FWIDTH 05 07 A3 See table below Field width FINTER 08 12 A5 See table below Attribute format ATT NAME 13 table below Attribute name See note 1 below DIVIDER x A1 Divider used to terminate variable length text fields CONT_MARK 11 0 No further records EOR A1 96 Record terminator Contents of ATTDESC VAL TYPE FWIDTH FINTER Al 006 16 ADMIN AREA ID FC 004 l4 FEAT CODE LK 010 110 GLOBAL_LINK_ID NM lt 3S gt NAME see note 1 below OP 009 A9 C
40. 09 2013 Crown copyright 40 of 94 NUTS 1 NUTS 2 NUTS 3 LAU 1 areas North West Outer London Cumbria Outer London East and North East Outer London South Outer London West and North West West Cumbria East Cumbria Barking and Dagenham Bexley Enfield Greenwich Havering Redbridge Waltham Forest Bromley Croydon Kingston upon Thames Merton Sutton Barnet Brent Ealing Harrow Hillingdon Hounslow Richmond upon Thames Allerdale Barrow in Furness Copeland Carlisle Eden South Lakeland Cheshire Halton and Warrington Cheshire West and Chester Cheshire East Halton Warrington Cheshire West and Chester Cheshire East Greater Manchester Greater Manchester South Greater Manchester North Manchester Salford Stockport Tameside Trafford Bolton Bury Oldham Rochdale Wigan Lancashire Blackburn with Darwen Blackpool Lancashire CC Blackburn with Darwen Blackpool Burnley Chorley Fylde Hyndburn Lancaster Pendle Preston Ribble Valley Rossendale South Ribble West Lancashire Wyre 00 000000 00006 6 Boundary Line user guide annexe D v1 18 09 2013 Crown copyright Page 41 of 94 Merseyside East Merseyside Liverpool Sefton The Wirral Knowsley St Helens Liverpool Sefton Wirral NUTS 1 NUTS 2 NUTS 3 LAU 1 areas North East Te
41. 19 30 R12 3 Variable number Area of non land VAL TYPE 31 32 A2 OP Mnemonic for CENSUS CODE attribute GSS code VALUE 33 41 A9 See note 2 below or GSS code or code unavailable to 999999999 Ordnance Survey or 9S8 No GSS code allocated VAL TYPE 42 43 A2 TY Type of admin area or voting area AA or VA or FA for non area or TA for sea VALUE 44 45 A2 See note 5 below Boundary Line technical specification chapter 5 v1 18 09 2013 Crown copyright 76 of 94 VAL TYPE 46 47 A2 AG Code of admin area or voting area VALUE 48 50 A3 See note 6 below VAL_TYPE 51 52 A2 NM for NAME attribute See note 7 below VALUE 53 note 3 below Admin area sea DIVIDER us A1 Divider used to terminate variable length text fields VAL TYPE yx A2 NB Mnemonic for NON TYPE CODE optional VALUE ps See note 4 below Code for the non type that exactly matches this area CONT MARK 11 0 No further records or 1 or continuation record follows EOR A A1 96 Record terminator Record examples 14002897A1017765NA0000058940550PE10000014TYAAACCTYNMHampshire CountyN0 14001799A1016261NA0000001299050PE07000229TYAAACDISNMWorthing District B NNB1 00CPC0 14000195AI025588NA000000899830OPE06000003TYAAACUTANMRedcar and Cleveland B N1 OONBUTENBCTY0 s asas ees tr roe Sa m Las Su aaa Ile te do Does Sowden 1234567890123456789012345678901234567890123456789012345678901
42. 2345678901234567890 dee em e eee ec o M s e e e Doe usss zre e yasa yl Template NOTE 1 valid VALUE for Al range is 000000 to 999999 NOTE 2 see GSS codes in chapter 3 of the user guide NOTE 3 Continuation Record s CONTREC commence with the record descriptor 00 NOTE 4 Civil parish or community CPC County CTY County electoral division CED Unitary authority electoral division UTE Unitary authority ward UTW NOTE 5 Civil administrative area AA Civil voting area VA Topographic area TA Judicial area JA Filler area FA NOTE 6 England Wales Description AC TY Description AC TY Civil parish or community CPC AA Civil parish or community CPC AA County CTY AA European region EUR VA County electoral division VA Non civil parish or community FA District DIS AA Unitary authority UTA AA District ward DIW VA Unitary authority electoral division UTE VA European region EUR VA Welsh Assembly constituency WAC VA Greater London Authority GLA AA Welsh Assembly electoral region WAE VA Greater London Authority Assembly LAC VA Westminster constituency WMC VA constituency London borough LBO AA London borough ward LBW VA Scotland Boundary Line technical specification chapter 5 v1 18 09 2018 Crown copyright Page 77 of 94 Metropolitan county AA Description AC TY Metropolitan district AA European region EUR VA Metropolitan district ward MT
43. 3 Non Area Type Description Char 36 Example of a MID file record County Dorset County CTY County DORSET COUNTY 12 884 122188 14362 19 257293 064 3030 932 AA CIVIL ADMINISTRATION AREA Example of a MIF file header County Version 450 Charset Windowslatinl Delimiter CoordSys Earth Projection 8 79 m 2 49 0 9996012717 400000 100000 Bounds 7845061 1011 15524202 1641 8645061 1011 4470074 53373 Columns 15 Name Char 60 Area Code Char 3 Area Description Char 50 File Name Char 50 Feature Serial Number Integer Collection Serial Number Integer Global Polygon ID Integer Admin Unit ID Integer Census Code Char 9 Hectares Decimal 12 3 Non Inland Area Decimal 12 3 Area Type Code Char 2 Area Type Description Char 25 Non Area Type Code Char 3 Non Area Type Description Char 36 NOTE Census Code represents the GSS codes 00000 0 6 0 0 000 66 6 Boundary Line technical specification chapter 2 v1 18 09 2013 Crown copyright 54 of 94 Example of a TAB record Info Tool Name Kent County Area Code Area Description County File Name KENT COUNTY Feature Serial Number 43 Collection Serial Number 4 355 Global 122 240 Admin Unit ID 18 210 Census Code 10000016 Hectares 363 943 022 Non Inland Area 9 666 680 Area Type Code Area Type Description C
44. 3456789012345678901234567890 exp 99End Of Transfer 1 sisse ler sno ope ee meo t eO mem roe moe t Ta wS 12345678901234567890123456789012345678901234567890123456789012345678901234567890 Iss exeo n meom m emm om Tm ow mx bm y Rl Template Boundary Line technical specification chapter 5 v1 18 09 2013 Crown copyright Page 86 of 94 AnnexeA Glossary absolute coordinates A coordinate pair or triplet measured directly from the origin of the coordinate system in which it lies and not to any other point in the system accuracy The closeness of the results of observations computations or estimates to the true values or the values accepted as being true Accuracy relates to the exactness of the result and is the exactness of the operation by which the result is obtained administrative area A blanket term used by Ordnance Survey to refer to all public administrative areas specifically local government management and electoral areas administrative unit A single administrative area alphanumeric Information in character form American Standard Code for Information Interchange ASCII A 7 bit code for encoding a standard character set area A spatial extent defined by circumscribing lines that form a closed perimeter that does not intersect itself attribute An attribute is a property of an entity usually used to
45. 567890123456789012345678901234567890 JR Pr p Template Section Header Record SECHREC 07 Field REC DESC SECT REF COORD TYP STRUC TYP XYLEN XY UNIT XY MULT ZLEN Z UNIT Z MULT X ORIG Y ORIG Z DATUM CONT MARK EOR Position 01 02 03 12 13 13 14 14 15 19 20 20 21 30 31 35 36 36 37 46 47 56 57 66 67 76 77 77 78 78 Format A2 A10 A1 Content 07 Admin name 00008 2 0000000100 00000 0 0000001000 Coordinates Coordinates 0000000000 1 Description Record descriptor Unique identifier of the main administration Defines rectangular coordinates followed by spaces Defines vector data Refines X_COORD and Y_COORD to 8 digits Defines units as metres Multiplies coordinates by 0 100 Not used Not used Multiplies coordinates by 0 100 Eastings of file origin always 0 Northings of file origin always 0 Not used Continuation record follows Record terminator NOTE 1 the field will comprise the first 10 characters of the main administration Boundary Line technical specification chapter 5 v1 18 09 2013 Crown copyright Page 74 of 94 Continuation record Field Position Format Content Description REC DESC 01 02 A2 00 Record descriptor XMIN 03 12 110 The smallest X value in Relative limits of file in metres file see note 1 below YMIN 13 22 110 The smallest Y value in Relative limits of file in metres file see note 1 below XM
46. 7890123456789012345678901234567890 Ete al Template NOTE Continuation Record s CONTREC commence with record descriptor 00 Boundary Line technical specification chapter 5 v1 18 09 2013 Crown copyright Page 82 of 94 Collection of Features Record COLLECT 34 Field Position Format Content REC_DESC 01 02 A2 34 COLL_ID 03 08 16 Variable number NUM PARTS 09 12 l4 Variable number REC DESC 13 14 A2 31 or 33 or 34 IPART_ID 15 20 16 Variable number NUM ATTS 12 01 ATT_ID a 16 Variable number CONT_MARK E 11 0 or 1 EOR is A1 96 variable integer Record example 3400 0034 0034 0034 0034 0034 0034 Description Record descriptor Unique identifier Number of iterations of REC DESC and PART ID that is the number of polygons comprising an administrative area together with the number of voting areas Polygon or complex polygon or collect for admin area or voting area relationships Cross reference to POLY 10 of Polygon Record CPOLY 10 of Complex Polygon Record or the COLL 10 of Collect Record The number of attribute identifiers that follow Cross reference to ID of Attribute Record for collection of features No further records or continuation record follows Record terminator 2973005531001925340029723400297134002970340029693400296834002967340029661 0029653400296434002963340028893400288834 0028633400271334002712340027113400271034
47. 9 2013 Crown copyright Page 6 of 94 Requirements to utilise Boundary Line Hardware Provided that sufficient memory storage facilities and a suitable software viewer application see below are available there are no constraints on the hardware platforms that can be used The range of hardware that can typically be used varies from higher specification personal computers PCs to mainframe computers Software Boundary Line is inert data and does not include software for data manipulation To fully exploit Boundary Line it is necessary to use appropriate application software There are many proprietary systems available and Ordnance Survey publishes a list of GIS computer aided design CAD and digital mapping system suppliers Transfer formats Boundary Line is created in e BS 7567 National Transfer Format NTF v2 0 Level 3 e ESRI Shapefile e Maplnfo9 MID MIF and TAB Media Boundary Line is supplied on DVD CD Update Boundary Line is now updated twice a year spring and autumn allowing a choice in which update is preferred The spring update represents boundaries as defined and modified by Orders Acts and Statutory Instruments at the date of the May local elections The autumn update also represents boundaries at the date of the May local elections and is operative from the previous spring May to autumn October release Unlike changes to other boundaries changes to Westminster constituency parliamentary boundari
48. AANCIVIL ADMINISTRATION AREANVANCIVIL VOTING AREA FA FI1 OOLLER AREANJANJUDICIAL AREANTANTOPOGRAPHIC 0 42 OO6CPC CIVIL PARISH OR COMMUNITYNCPWNCIVIL PARISH OR COMMU1 OONITY WARDNCTYNCOUNTYNCEDNCOUNTY ELECTORAL DIVISIONNUTENUNITARY AUTHORITY EL1 OOECTORAL DIVISIONNUTWNUNITARY AUTHORITY WARD 0 ducem mre ees esae ee sect Tsao Se TUS 567890123456789012345678901234567890123456789012345678901234567890 12345678901234 amp acsi lense n ett omae ss em Dm m t et ensa hressa Template SS Boundary Line technical specification chapter 5 v1 18 09 2013 Crown copyright Page 85 of 94 Volume Termination Record VOLTERM 99 Field Position Format Content Description REC DESC 01 02 A2 99 Record descriptor FREE TEXT 03 A See note 1 below Message CONT VOL 11 0 No further volumes or 1 or continuation volume follows EOR A1 96 Record terminator variable integer NOTE if there are further volume s to follow the FREE TEXT field contains the following message End Of Volume nn Transfer Set Continues On Volume 1 If there are no further volumes the FREE field contains following the message End Of Transfer Set Record examples 99End Of Volume 01 Transfer Set Continues On Volume 02 15 sewer t mes mado soe eee aoe Oey allo me rx e eS 1234567890123456789012345678901234567890123456789012
49. AND MAIDENHEAD WOKINGHAM YORK Unitary England lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt v a l D Dl D l D l D D l dl D D D D l l D d D D D D D D D D D d Boundary Line user guide annexe v1 18 09 2013 Crown copyright Page 36 of 94 Annexe D European statistical classifications aligned to Boundary Line Information published by the Office for National Statistics ONS identifies the European classification system called NUTS Nomenclature of Units for Territorial Statistics this information provides a breakdown of UK regions and countries allowing for a comparable view of economic activity across the European Union http www statistics gov uk geography nuts asp e NUTS1 English Government Office Regions Wales Scotland and Northern Ireland e NUTS2 37 areas mainly groups of counties and unitary authorities e NUTSS 133 areas principally individual counties and unitary authorities NUTS 1 NUTS 2 NUTS 3 LAU 1 areas South West Gloucestershire Wiltshire and Bristol city of Bristol city of North Somerset Bath and North East Somerset Bath and North East Somerset North Somerset and South North Somerset Gloucestershire South Gloucestershire Gloucestershire Cheltenham Cotswold Forest of Dean Gloucester Stroud Tewkesbury Swindon Swindon Wiltshire Wiltshire Dorset and Somer
50. AX 23 32 110 The largest X value in file Relative limits of file in metres see note 1 below YMAX 33 42 110 The largest Y value in file Relative limits of file in metres see note 1 below XY ACC 43 47 R5 2 00000 Not used Z ACC 48 52 R5 2 00000 Not used SURV DATE 53 60 D8 YYYYMMDD Date of the annual snapshot of boundaries represented by the annual product release LAST AMND 61 68 D8 00000000 Not used COPYRIGHT 69 76 D8 YYYYMMDD Copyright date for the annual product release CONT MARK 77 77 1 0 No further records EOR 78 78 A1 96 Record terminator Record examples O7HAMPSHIRE 21000082000000010000000000000010000000000000000000000000000000001 00000040309500000896630000488768000016538100000000002008050100000000200803010 222 22 lla rt x oe a dare e aca s dre Dome Oe sell me T ree wee 12345678901234567890123456789012345678901234567890123456789012345678901234567890 esa 2 ca c dme deccm s Deni dinde m o e n el Template NOTE 1 XMIN YMIN XMAX and YMAX values are calculated from a geometric square enclosing the delivery set In some cases this may mean that XMIN has a negative value Boundary Line technical specification chapter 5 v1 18 09 2013 Crown copyright 75 of 94 Attribute Record ATTREC 14 for Line Record LINEREC 23 Field Position Format Content Description REC DESC 01 02 A2 14 Record descriptor ATT ID 03 08 16 Variable number Unique ID in file Cross
51. ENSUS_CODE PI 006 16 GLOBAL POLYGON ID HA 012 R12 3 HECTARES AC 003 A3 AREA CODE NA 012 R12 3 NON INLAND AREA NB 003 A3 NON TYPE CODE TY 002 A2 AREA TYPE variable integer NOTE 1 punctuation is shown in names but not accentuation for example the name Westward Ho Ward includes the exclamation mark but Ynys M n is shown as Ynys Mon Record examples 40LK010110 GLOBAL LINK 1 0 40AIO00616 ADMIN AREA 0 40 100616 GLOBAL POLYGON 0 40NA012R12 3NON_INLAND_AREA 0 40HA012R12 3HECTARES 0 40NM A NAME 0 400P009A9 CENSUS_CODE 0 40 002 2 AREA TYPENOS 40FCOOAIA FEAT 40AC003A3 AREA_CODE 0 40NB003A3 NON_TYPE_CODE 0 as sa a Lis dence So ya aene kaa Ace S eem eO Sodan em d mS 12345678901234567890123456789012345678901234567890123456789012345678901234567890 edes geb lbs xm wee Iw em ede l Template Boundary Line technical specification chapter 5 v1 18 09 2013 Crown copyright Page 84 of 94 Code List Record CODELIST 42 Field Position Format Content Description 01 02 A2 42 Record descripto
52. Each may contain a single isolated node seed point which identifies the polygon polygon boundary The link s which enclose a polygon projected into the horizontal plane A chain polygon point See seed point positional accuracy The degree to which the coordinates define a point s true position in the world directly related to the spheroid and or projection on which the coordinate system is based precision The exactness with which a value is expressed whether the value be right or wrong record A set of related data fields grouped for processing rectangular coordinates Also known as X Y coordinates and as eastings and northings These are two dimensional coordinates that measure the position of any point relative to an arbitrary origin on a plane surface for example a map projection relative accuracy The measure of the internal consistency of the positional measurements in a dataset For many local area purposes for example records utility plant relative accuracy is more important than absolute accuracy In this case accurate measurement of offsets from fixed points is required rather than knowledge of the true position in space resolution A measure the ability to detect quantities High resolution implies a high degree of discrimination but has no implication as to accuracy For example in a collection of data in which the coordinates are rounded to the nearest metre resolution is 1 metre but the accuracy
53. GIS when accessing the table contents The FID column uniquely identifies each object stored in the table The SHAPE column provides information about the feature geometry File names for layered Shapefile England Scotland Wales County region Inc GLAs district borough unitary region district borough unitary region county electoral division region district borough unitary ward region european region region district borough unitary region european region region high water polyline district borough unitary ward region high water polyline parish region european region region parish region scotland and wales const region greater london const region scotland and wales const region scotland and wales region region high water polyline scotland and wales region region unitary electoral division region parish region westminster const region westminster const region unitary electoral division region westminster const region Directory names for nested Shapefile England Scotland Wales County European Region European Region European Region Scottish Parliamentary Electoral Region Unitary Authority London Administration Unitary Authority Welsh Assembly Electoral Region Metropolitan District Westminster Constituency Westminster Constituency Unitary Authority Westminster Consituency
54. ICT LIVERPOOL DISTRICT MANCHESTER DISTRICT NEWCASTLE UPON TYNE DISTRICT NORTH TYNESIDE DISTRICT OLDHAM DISTRICT ROCHDALE DISTRICT ROTHERHAM DISTRICT SALFORD DISTRICT SANDWELL DISTRICT SEFTON DISTRICT SHEFFIELD DISTRICT SOLIHULL DISTRICT SOUTH TYNESIDE DISTRICT ST HELENS DISTRICT STOCKPORT DISTRICT SUNDERLAND DISTRICT TAMESIDE DISTRICT TRAFFORD DISTRICT WAKEFIELD DISTRICT WALSALL DISTRICT WIGAN DISTRICT WIRRAL DISTRICT lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt Boundary Line user guide annexe v1 18 09 2013 Crown copyright Page 32 of 94 District England Borough status District England Borough status No 100 Yes 101 ADUR N ALLERDALE Y ARUN N AMBER VALLEY Y ASHFIELD N ASHFORD Y AYLESBURY VALE N BARROW IN FURNESS Y BABERGH N BASILDON Y BASSETLAW N BASINGSTOKE AND DEANE Y BLABY N BOSTON Y BOLSOVER N BRENTWOOD Y BRAINTREE N BROXBOURNE Y BRECKLAND N BROXTOWE Y BROADLAND N BURNLEY Y BROMSGROVE N CAMBRIDGE Y CANNOCK CHASE N CANTERBURY Y CHERWELL N CARLISLE Y CHICHESTER N CASTLE POINT Y CHILTERN N CHARNWOOD Y COTSWOLD N CHELMSFORD Y CRAVEN N CHELTENHAM Y DAVENTRY N CHESTE
55. IVIL ADMINISTRATION AREA amp rea Type Code Mon Area Type Description gt gt tst county 10 2 Example of a MIF file header Mean high water Version 450 Charset WindowsLatinl Delimiter CoordSys Earth Projection 8 79 m 2 49 0 9996012717 400000 100000 Bounds 7845061 1011 15524202 1641 8645061 1011 4470074 53373 Columns 5 Feature Code Char 4 Feature Description Char 5 File Name Char 50 Feature Serial Number Integer Global Link ID Integer Data Example of a MID file record Mean high water 0071 High CAMBRIDGESHIRE COUNTY 982 58737 Example of a TAB file record Mean high water Info Tool Feature Code 9074 Feature Description High Water Mark File ORKNEY_ISLANDS Feature Serial Number 745 Global Link ID 451 765 List high water 08 01 Boundary Line technical specification chapter 2 v1 18 09 2013 Crown copyright 55 of 94 File names for layered MID MIF and TAB England Scotland Wales County inc GLAs district borough_unitary district_borough_unitary county_electoral_division district borough_unitary_ward european_region district_borough_unitary european_region high_water district_borough_unitary_ward high_water parish european_region parish scotland and wales const greater london const scotland and wales const scotland and wales region high water scotland and wales region unitary electoral division parish
56. London borough Sutton London borough Ealing London borough Richmond upon Thames London borough Havering London borough Merton London borough Hillingdon London borough Wandsworth London borough Harrow London borough Hammersmith and Fulnam London borough Brent London borough Kensington and Chelsea London borough Barnet London borough City of Westminster London borough Lambeth London borough Camden London borough Southwark London borough Tower Hamlets London borough Lewisham London borough Islington London borough Greenwich London borough Hackney London borough Bexley London borough Haringey London borough Barking and Dagenham London borough Newham London borough City of London North West Cheshire West and Chester Warrington Cheshire East Cumbria county Sefton metropolitan district Stockport metropolitan district Lancashire county St Helens metropolitan district Bolton metropolitan district Tameside metropolitan district Bury metropolitan district Trafford metropolitan district Knowsley metropolitan district Wigan metropolitan district Liverpool metropolitan district Wirral metropolitan district Manchester metropolitan district Oldham metropolitan district Blackburn with Darwen Blackpool Rochdale metropolitan district Salford metropolitan district Halton Boundary Line user guide annexe v1 18 09 2013 Crown copyright 29 of 94 North East
57. MBE N WORCESTER Y WYRE FOREST N WORTHING Y WYRE Y Unitary England Borough status No 215 Borough status Yes 41 BATH AND NORTH EAST SOMERSET CENTRAL BEDFORDSHIRE CORNWALL COUNTY DURHAM COUNTY OF HEREFORDSHIRE EAST RIDING OF YORKSHIRE ISLE OF WIGHT ISLES OF SCILLY NORTH SOMERSET NORTHUMBERLAND RUTLAND SHROPSHIRE SOUTH GLOUCESTERSHIRE WEST BERKSHIRE WILTSHIRE 2 z z z z z 7 BEDFORD BLACKBURN WITH DARWEN BLACKPOOL BOURNEMOUTH BRACKNELL FOREST BRIGHTON AND HOVE CHESHIRE EAST CHESHIRE WEST AND CHESTER CITY OF BRISTOL CITY OF DERBY CITY OF KINGSTON UPON HULL CITY OF LEICESTER CITY OF NOTTINGHAM CITY OF PETERBOROUGH CITY OF PLYMOUTH CITY OF PORTSMOUTH CITY OF SOUTHAMPTON CITY OF STOKE ON TRENT DARLINGTON HALTON HARTLEPOOL LUTON lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt IX Boundary Line user guide annexe v1 18 09 2013 Crown copyright 35 of 94 Borough status Borough status No 15 Yes 41 MEDWAY Y MIDDLESBROUGH MILTON KEYNES NORTH EAST LINCOLNSHIRE NORTH LINCOLNSHIRE POOLE READING REDCAR AND CLEVELAND SLOUGH SOUTHEND ON SEA STOCKTON ON TEES SWINDON TELFORD AND WREKIN THURROCK TORBAY WARRINGTON WINDSOR
58. Normal tidal limit NTL The point at which the level of a river or stream ceases to be affected by the tidal flow This point is often an artificial barrier such as a lock or weir Pier A pier under which water flows is not normally considered to be within the realm There are some cases however where a structure has specifically been included within the realm by act or order in which case mean high water springs mark and EOR is shown around the limits of the structure Point B This is the intangible line across a channel where the level of the river meets the level of the sea at low water Within large channels or estuaries Point B is defined on the source documents for Boundary Line and is therefore shown as EOR In small channels Point B is not shown on the source documents so is assumed to be along the general line of low water and is shown as EOR Seaward extensions These are artificial extensions to the realm that have been made by Act of Parliament They extend the local government and parliamentary areas seaward of mean low water springs mark Boundary Line user guide chapter 3 v1 18 09 2013 Crown copyright Page 22 of 94 Figure 3 6 A seaward extension WOODINGDEAN WARD MARINE WARD ROTTINGDEAN WARD Structures in the sea Breakwaters are structures of wood stone metal or other material built to break the force of waves They can be separate from or joined to the mainland If joined they are gene
59. RFIELD Y DERBYSHIRE DALES N CHORLEY Y DOVER N CHRISTCHURCH Y EAST CAMBRIDGESHIRE N COLCHESTER Y EAST DEVON N COPELAND Y EAST DORSET N CORBY Y EAST HAMPSHIRE N CRAWLEY Y EAST HERTFORDSHIRE N DACORUM Y EAST LINDSEY N DARTFORD Y EAST NORTHAMPTONSHIRE N EASTBOURNE Y EDEN N EASTLEIGH Y EPPING FOREST N EAST STAFFORDSHIRE Y FENLAND N ELMBRIDGE Y FOREST HEATH N EPSOM AND EWELL Y FOREST OF DEAN N EREWASH Y HAMBLETON N EXETER Y HARBOROUGH N FAREHAM Y HARLOW N FYLDE Y HART N GEDLING Y HORSHAM N GLOUCESTER Y HUNTINGDONSHIRE N GOSPORT Y LEWES N GRAVESHAM Y LICHFIELD N GREAT YARMOUTH Y MALVERN HILLS N GUILDFORD Y MANSFIELD N HARROGATE Y MENDIP N HASTINGS Y MID DEVON N HAVANT Y MID SUFFOLK N HERTSMERE Y MID SUSSEX N HIGH PEAK Y Boundary Line user guide annexe v1 18 09 2013 Crown copyright Page 33 of 94 District England MOLE VALLEY Borough status No 100 N District England HINCKLEY AND BOSWORTH Borough status Yes 101 Y NEW FOREST HYNDBURN NEWARK AND SHERWOOD IPSWICH NORTH DEVON KETTERING NORTH DORSET KING S LYNN AND WEST NORFOLK NORTH EAST DERBYSHIRE LANCASTER NORTH HERTFORDSHIRE LINCOLN NORTH KESTEVEN MAIDSTONE NORTH NORFOLK MALDON NORTH WEST LEICESTERSHIRE MELTON PURBECK NEWCASTLE UNDER LYME RICHMONDSHIRE NORTH WARWICKSHIRE ROCHFORD NORTHAMPTON ROTHER NORWICH RYEDALE NUNEATON AND BEDWORTH SEDGEMOOR OADBY AND WIGSTON SELBY OXFORD SEVENOAK
60. S PENDLE SHEPWAY PRESTON SOUTH BUCKS REDDITCH SOUTH CAMBRIDGESHIRE REIGATE AND BANSTEAD SOUTH DERBYSHIRE RIBBLE VALLEY SOUTH HAMS ROSSENDALE SOUTH HOLLAND RUGBY SOUTH KESTEVEN RUNNYMEDE SOUTH LAKELAND RUSHCLIFFE SOUTH NORFOLK RUSHMOOR SOUTH NORTHAMPTONSHIRE SCARBOROUGH SOUTH OXFORDSHIRE SOUTH RIBBLE SOUTH SOMERSET SPELTHORNE SOUTH STAFFORDSHIRE ST ALBANS STAFFORDSHIRE MOORLANDS ST EDMUNDSBURY STRATFORD ON AVON STAFFORD STROUD STEVENAGE SUFFOLK COASTAL SURREY HEATH TANDRIDGE SWALE TEIGNBRIDGE TAMWORTH TENDRING TAUNTON DEANE THANET TEST VALLEY THREE RIVERS TEWKESBURY TORRIDGE TONBRIDGE AND MALLING UTTLESFORD TUNBRIDGE WELLS VALE OF WHITE HORSE WATFORD WARWICK WAVERLEY WAVENEY WELLINGBOROUGH WEALDEN WELWYN HATFIELD WEST DORSET 2121 2 212 212 2121212212122 2121221202121 2121212212212 2 2212121212121 2121221212122 WEST DEVON lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt lt Boundary Line user guide annexe v1 18 09 2013 Crown copyright Page 34 of 94 District England SEED a District England WEST LINDSEY N WEST LANCASHIRE Y WEST OXFORDSHIRE N WEYMOUTH AND PORTLAND Y WEST SOMERSET N WINCHESTER Y WYCHAVON N WOKING Y WYCO
61. S uwa 61 PIOGUCt EE 61 NTE yere II uu Rm 61 Specific Boundary Line NTF 61 Area 61 resi ER 61 ER 61 62 Government Statistical Service GSS 62 Boundary Line technical specification contents v1 18 09 2013 Crown copyright Page 48 of 94 Chapter 5 Annexe A Recordio eea MORE 62 Record terminator EOR I 62 DEC RETREH 62 Unique identifiers for administrative unit enn 62 Relationships between record Ds U T a 63 Tidal and other coastal information U 63 Complex 64 Data classification and metadata 64 m 64 Explicit administration and or voting area relationships 66 Transfer certe reete tribe red e ERE Ea 67 Volume records E 67 Database Tecords epo t ee nemini rei om cre tre ied 67 Sire ccc 67 Section body data u 67 Se
62. W VA Scottish Parliament constituency SPC VA Non civil parish or community NCP FA Scottish Parliament electoral region SPE VA Unitary authority UTA AA Unitary authority UTA AA Unitary authority electoral division UTE VA Unitary authority ward UTW VA Unitary authority ward UTW VA Unitary authority electoral division UTE VA Westminster constituency WMC VA Westminster constituency WMC VA NOTE 7 punctuation is shown in names but not accentuation for example the name Westward Ho Ward includes the exclamation mark but Ynys M n is shown as Ynys Mon Attribute Record ATTREC 14 for Polygon Record POLYGON 31 and Complex Polygon Record CPOLY 33 Field Position Format Content Description REC_DESC 01 02 A2 14 Record descriptor ATT_ID 03 08 16 Variable number Unique in the file Cross reference to ATT_ID in Polygon Record Complex Polygon Record VAL TYPE 09 10 A2 PI Mnemonic for GLOBAL POLYGON ID VALUE 11 16 16 note 1 below Unique in dataset ID for polygon VAL TYPE 17 18 A2 HA Mnemonic for HECTARES attribute VALUE 19 30 R12 3 Variable number Area of polygon or complex polygon CONT MARK 31 31 11 0 No further records EOR 32 32 A1 96 Record terminator Record example 14000046PI800046HA0000039468770 tele Ip P DTI TEMP p 12345678901234567890123456789012345678901234567890123456789012345678901234567890 Mercere lonce Teras PPS PES PEE
63. and QPLAN iterate the number of times shown in NUM COORD NOTE 2 Continuation Record s CONTREC commence with the record descriptor 00 Boundary Line technical specification chapter 5 v1 18 09 2013 Crown copyright 79 of 94 Line Record LINEREC 23 Field Position REC DESC 01 02 LINE ID 03 08 GEOM ID 09 14 NUM ATT 15 16 ATT ID 17 22 CONT MARK 23 23 EOR 24 24 Record example Format A2 23800463800463018004630 Er Content 23 Variable number Variable number 01 Variable number 96 pp PA s geeks Description Record descriptor Line ID unique in file Cross reference to GEOM 10 in Geometry Record for link The number of attribute identifiers that follow Cross reference to ATT 0 in Attribute Record No further records Record terminator pre gp 12345678901234567890123456789012345678901234567890123456789012345678901234567890 Template NOTE LINE ID GEOM 10 ID are the same variable number Chain Record CHAIN 24 Field Position REC DESC 01 02 CHAIN ID 03 08 NUM PARTS 09 12 GEOM ID 13 18 DIR 19 19 CONT MARK EOR ig variable integer Record examples Format A2 l6 14 16 l1 A1 Content 24 Variable number Variable number Variable number or 2 or 1 96 Description Record descriptor Unique in file ID of Chain Cross reference to CHAIN ID Polygon Record Number of
64. and and Scotland are treated as county boundaries in Boundary Line which have been created from the local authority boundaries Government Statistical Service codes These codes are a unique system of referencing for administrative units The Office for National Statistics has reconfigured its GSS coding structure providing a unique system of referencing for administrative units to a new nine character alphanumeric format replacing the former alphanumeric format up to six characters The GSS codes were imported into the October 2010 release of Boundary Line The new GSS coding and naming policy for some statistical geographies were fully implemented on 1 January 2011 where new codes have been allocated they should be used in all exchanges of statistics and published outputs that normally include the statistical codes All types of unit are coded in Boundary Line with the exception of Greater London Authority county electoral divisions and non civil parish areas The codes are allocated by the Office of National Statistics ONS for England and Wales and by the General Register Office for Scotland GROS for Scottish areas Boundary Line user guide chapter 3 v1 18 09 2013 Crown copyright Page 19 of 94 NOTE beginning with the October 2010 release a nine figure coding format has replaced the six figure coding No longer is there any relationship between principal areas and their subdivisions for example Hampshire County was 24 N
65. and is conceptual in form See also layer line A series of connected coordinated points forming a simple feature with homogeneous attribution line feature The spatial abstraction of an object in one dimension Lines may intersect with other lines They are defined as a series of two or more coordinate pairs and may be curved or straight Curved lines consist of a series of very short straight line segments As an object abstraction a line has no width line segment A vector connecting two coordinated points line and or link collect Whenever an update occurs the original Boundary Line is broken into many links due to the need to retain the old part of the boundary This entity allows the original line to be recreated using the current links There are as many occurrences this entity for a given line as there are links that make it up Any query concerning the history of a line for example to recreate a Boundary Line at a point in time needs to retrieve all the relevant occurrences and join the links together to form the geometry of the original line This entity should relate to the NTF Collect record Boundary Line technical specification annexe v1 18 09 2013 Crown copyright 90 of 94 link or edge Links are the representation of line features They are made up of one or more consecutive non intersecting link segments with common attributes between two terminating nodes Links have no connection with other links
66. ard extensions 22 Str ctures in tlie uu uuu 23 medsHE85 coe SEI I SEE Ei sananpa qasa 24 Change update Statutory Instruments SI and non SI changes in October 2013 Boundary Line Felg se setis s ER SUIS EA ER CE A SR ERAS RA IDEE EE 25 Eriglandissce eburnea 25 Scotland m sp asas 26 Wales aaa 26 Changes not incorporated into the October 2013 Boundary Line update 28 Residual Statutory Instruments 515 and non Sls 28 Englandzz senos UR eei M temi MAI 28 Boundaries that relate to Government Office Region 29 Borough f 32 European statistical classifications aligned to Boundary Line 37 e S 45 Creating the right environment for data management The Welsh Environmental Data Interface vedic chide ee we ae eae pavo edi ee ln ected 45 Sharing data across the NHS to improve patient services sse 45 Metadata u u uu uu M II D 46 Product and service performanc
67. ariable length records EOR 63 63 A1 96 Character used for EOR on unformatted media or S If default then EOR is 96 for formatted media DIVIDER 64 64 A1 Divider used to terminate variable length text fields CONT MARK 65 65 11 0 No further records EOR 66 66 A1 96 Record terminator Record example OLORDNANCE SURVEY s aa rutrum er ne m riw p Ga I rope 2004021900000130200V 0 12345678901234567890123456789012345678901234567890123456789012345678901234567890 weve hecer escal Template NOTE 1 VOLNUM is 01 for the first volume and is incremented for subsequent volumes Boundary Line technical specification chapter 5 v1 18 09 2018 Crown copyright Page 72 of 94 Database Header Record DBHREC 02 Field Position Format REC DESC 01 02 A2 DBNAME 03 22 A20 DDNAME 23 42 A20 DDATE 43 50 D8 DDBASE 51 70 A20 DDBDATE 71 78 D8 CONT MARK 79 79 I EOR 80 80 A1 Continuation record Field Position Format REC DESC 01 02 12 03 22 23 30 D8 DQNAME 31 50 A20 DQDATE 51 58 D8 DATA MODEL 59 60 12 CONT MARK 61 61 I EOR 62 62 A1 Record examples 02Boundary Line DEFAULT 02 00 Content 02 Boundary Line lt 7S gt DEFAULT_02 00 lt 7S gt 19920515 lt 20S gt 00000000 1 Content 00 A20N_FC lt 13s gt YYYYMMDD lt 20S gt 00000000 00 0 19920515 Description Record descriptor Product nam
68. ation This is included for compatibility with other products Chain Record data about links forming polygons Polygon Record data about polygons Complex Polygon Record data about complex polygons Collection of Features Record data on how polygons and collections are associated Attribute Description Record defines attribute descriptions and their fields Code List Record describes the coded values that appear in attribute fields Volume Termination Record defines the end of the transfer set Record name VOLHDREC DBHREC FEATCLASS SECHREC ATTREC GEOMETRY1 LINEREC CHAIN POLYGON CPOLY COLLECT ATTDESC CODELIST VOLTERM Complex Polygon Record CPOLY is only included to deal with polygons with holes as described in chapter 2 of the user guide Overview of Boundary Line otherwise all records are compulsory for all transfers Boundary Line technical specification chapter 5 v1 18 09 2013 Crown copyright 71 of 94 Volume Header Record VOLHDREC 01 Field Position Format Content Description REC_DESC 01 02 A2 01 Record descriptor DONOR 03 22 A20 ORDNANCE SURVEY lt 5S gt Supplier RECIPIENT 23 42 A20 lt 20S gt Not used TRANDATE 43 50 D8 20040219 Date of creation of the transfer set SERIAL 51 54 4 0000 Not used VOLNUM 55 56 12 See note 1 below Volume sequential number NTFLEVEL 57 57 l1 3 NTF level 3 NTFVER 58 61 R4 2 0200 NTF version 2 0 NTFOR 62 62 A1 V V
69. ation of terms and conditions under which permission for their reproduction is given currency An expression of the up to dateness of data data A representation of facts concepts or instructions in a formalised manner suitable for communication interpretation or processing database An organised integrated collection of data stored so as to be capable of use in relevant applications with the data being accessed by different logical paths Theoretically it is application independent but in practice rarely so database NTF A group of one or more sections with common characteristics defined in a data dictionary Information and data being transferred in a transfer set is deemed to belong to one or more databases These may be databases in the literal sense or may be collections of data from a common source such as a national coverage of large scale mapping data capture The encoding of data In the context of digital mapping this includes map digitising direct recording by electronic survey instruments and the encoding of text and attributes by whatever means data format A specification that defines the order in which data is stored or a description of the way data is held in a file or record Boundary Line technical specification annexe v1 18 09 2013 Crown copyright Page 88 of 94 data model An abstraction of the real world that incorporates only those properties thought to be relevant to the application or appl
70. citly The rules applied are as follows e For each county named in the file the following will appear in the COLLECT record COLL 10 to its related districts and COLL ID to its related county EDs e For each district named in the file the following will appear in the COLLECT record COLL 10 to its related district wards COLL 10 to its related civil parishes or communities where present and COLL ID to its related non civil parishes where present For each unitary authority named in the file the following will appear in the COLLECT record COLL ID to its related unitary authority wards or unitary authority EDs COLL 10 to its related civil parishes or communities where present and COLL ID to its related non civil parishes or communities where present For each metropolitan district named in the file the following will appear in the COLLECT record COLL ID to its related metropolitan district wards COLL 10 to its related civil parishes where present and COLL 10 to its related non civil parishes where present e Forthe Greater London Authority the following will appear in the COLLECT record COLL ID to all the Greater London Authority Assembly constituencies and COLL 10 to all the London boroughs including the City and county of London e For each London borough named in the file the following will appear in the COLLECT record COLL 10 to its related London borough wards e For each Sc
71. cking on the blue hyperlinks and the table of contents If you are unfamiliar with any words or terms used and require clarification please refer to the glossary at the end of the document Boundary Line user guide preface v1 18 09 2013 Crown copyright Page 5 of 94 Chapter 1 An introduction to Boundary Line This user guide is an introduction to Boundary Line that offers guidance and advice on how to deliver the maximum value from the product The technical specification provides specific details of the structure content and formats of Boundary Line for customers using the data in a geographical information system GIS or other systems The technical specification should be used in conjunction with the user guide Boundary Line provides administrative and electoral boundaries and their names for England Scotland and Wales Boundary Line represents the hierarchy of boundaries in Great Britain Boundary Line for England and Wales was initially digitised from Ordnance Survey s boundary record sheets at 1 10 000 scale or in some cases at 1 10 560 scale The 1 10 000 scale published mapping has been progressively withdrawn as it is replaced by OS Landplan Boundary Line now uses this as the source document occasionally mapped against large scale sources The Government Statistical Service GSS codes are supplied by the Office of National Statistics ONS and General Registers of Scotland GROS Appropriate software is needed to
72. ction body records 1er iiit 68 How the section body data is arranged u uu 68 Section body record structure nennen 69 Data supply 69 Supply of data on formatted media asss 69 Record structures for the transfer of Boundary Line in NTF 71 NIP uuu l a asas ely eee 71 Volume Header Record VOLHDREC 01 l I a 72 Database Header Record DBHREC 02 a 73 Feature Classification Record FEATCLASS 05 74 Section Header Record SECHREC 07 U entren nennen 74 Attribute Record ATTREC 14 for Line Record LINEREC 23 76 Attribute Record ATTREC 14 for Collection of Features Record COLLECT 34 76 Attribute Record ATTREC 14 for Polygon Record POLYGON 31 and Complex Polygon Record CPOLY Ec 78 Geometry Record SEOMETRY1 21 I U n 79 Line Record LINEREC 29 U US wiles aa a o 80 Record CHAIN 24 reote teet re reete ett d rupe cua 80 Polygon Record POLYGON 31 un 81 Complex Polygon Record CPOLY 33 sse nnne 82 Collection of Features Record COLLECT 34
73. d in Boundary Line data as geometric structures of links They are arranged into recognisable categories Full listings of individual features are listed in chapter 2 of the technical specification Specific Boundary Line NTF information Boundary Line user guide chapter 2 v1 18 09 2013 Crown copyright Page 10 of 94 Each feature has the following component e feature attribute data Each geometric feature has an additional component e feature position Each link has a geometric and attribute component The geometric component defines the positional characteristic of the feature and explicit relationships exist between administrative units and polygons and the links and polygons The attribute component defines the descriptive characteristics of the feature together with the classification Feature position The geometry of map features is defined in terms of coordinates All coordinates used in Boundary Line are based on the Ordnance Survey National Grid NG coordinate referencing system and are quoted to a 0 1 m resolution Despite this Boundary Line data can be no more accurate than its source primarily the generalised 1 10 000 scale mapping There will be positional differences between the boundaries in Boundary Line and Ordnance Survey large scale topographic products This is due to the large scale products being surveyed to a higher degree of accuracy and associated to ground surface features at scales such as 1 1250 and 1 2500
74. don borough including the county of the City of London e Metropolitan district e Scottish parliamentary constituency and electoral region e Unitary authority e Ward district unitary metropolitan and London borough e Welsh Assembly constituency and electoral region e Westminster parliamentary constituency e extent of the realm EOR either mean low water mark England and Wales mean low water springs mark Scotland or seaward boundary extensions Boundary Line user guide chapter 2 v1 18 09 2013 Crown copyright Page 8 of 94 mean high water mark England and Wales and or mean high water springs mark Scotland both are abbreviated to MHW in this user guide distinctive names GSS codes in England Wales and Scotland for all units with exception of Greater London Authority county electoral divisions and non civil parish areas area measurements unique administrative unit link and polygon identifiers and annual updates of the dataset Boundary Line files and sub levels The data is supplied as named files The named files include all of the other relevant sub levels of electoral boundaries that belong under that high level administration these are Named file type County The named county district district ward civil parish county electoral division ED Unitary authority The named unitary authority unitary authority ward or unitary Metropolitan district Greater London Authority
75. e Standard NTF data dictionary name Date of standard data dictionary Not used Not used Continuation record follows Record terminator Description Record descriptor Product specification The name of the feature classification scheme being transferred Product specification date Not used Not used Default model is used No further records Record terminator 000000001 00A20N FC 20021001 00000000000 eee wies eus ud ls doe sev lig same vues D eee 5 sees ese 12345678901234567890123456789012345678901234567890123456789012345678901234567890 See TR 2 wee leew a e Rum Template Boundary Line technical specification chapter 5 v1 18 09 2013 Crown copyright Page 73 of 94 Feature Classification Record FEATCLASS 05 Field Position Format Content Description REC_DESC 01 02 A2 05 Record descriptor FEAT CODE 03 06 4 0071 Feature code for MHW CODE COM 07 16 A10 108 Not used STCLASS 17 36 A20 lt 20S gt Not used FEATDES M A High Water HWM For MHW DIVIDER 1 Divider used to variable length fields CONT_MARK iie 11 0 No further records EOR A1 96 Record terminator variable integer Record example 050071 High Water Mark HWM N0 rrer Deo aotem esce erar sss ocs s Oreo eel lee og xe sa 12345678901234567890123456789012345678901234
76. e pair A coordinate pair is an easting and a northing coordinates Pairs of numbers expressing horizontal distances along original axes Alternatively triplets of numbers measuring horizontal and vertical distances Row and column numbers of pixels from raw imagery are not considered coordinates for the purpose of the standard continuation mark A logical record may contain more data than can be held in a single physical record The physical record contains a continuation mark the penultimate character of the record in NTF to indicate whether more data is to be found in a continuation record continuation record A specific NTF term A continuation record is used where space does not allow one logical record to be contained wholly within one physical record copyright Copyright is a legal property right that enables the creator and or owner of an original work to protect it from unauthorised use Through the Copyright Designs and Patents Act 1988 Crown copyright continues to subsist in Ordnance Survey products until the end of the period of 50 years from the end of the year in which they were published and in the case of data from the end of the year in which it was extracted from the Ordnance Survey database Crown copyright is vested in The Controller of Her Majesty s Stationery Office who has delegated powers to the Director General Ordnance Survey for the administration of copyright in publications and data including the determin
77. e part They also have an Attribute Record ATTREC for polygon and collection of features and a Geometry Record GEOMETRY 1 for polygons The polygons associated with a Complex Polygon Record CPOLY do not have any geometry or attributes but the containing polygon is held explicitly Data classification and metadata Attribute codes Attribute codes provide supplementary information on a feature providing such qualifying information as feature code feature name and so on See also Other attributes in chapter 2 Overview of Boundary Line of the user guide The structure of the attributes is described in the Attribute Description Record ATTDESC The Attribute Record ATTREC holds the attribute detail of a record The following attributes are used in the supply of Boundary Line data Mnemonic Name Description Al ADMIN AREA ID Unique identifier for administrative unit AC AREA CODE Coded value for the area FC FEAT CODE Feature code for selected links HA HECTARES Area of polygon within file LK GLOBAL LINK ID Unique identifier for a link NA NON INLAND AREA Area of non inland within an administrative area NM NAME Distinctive name of administrative unit NB NON TYPE CODE Coded value of matching non area OP CENSUS CODE GSS code allocated by ONS or GROS to administrative unit PI GLOBAL POLYGON ID Unique identifier for a polygon TY AREA TYPE Value indicating the type of administrative unit or area ADMIN AREA ID
78. e report form 47 v1 18 09 2013 D05300 02a Boundary Line user guide contents v1 18 09 2013 Crown copyright Page 3 of 94 Preface This user guide hereafter referred to as the guide is designed to provide an overview of Boundary Line hereafter referred to as the product and it gives guidelines and advice on how a customer might derive the maximum benefit from the product It assumes a general knowledge of geographic information If you find an error or omission in this guide or otherwise wish to make a comment or suggestion as to how we can improve it please contact us at the address shown below or complete the product and service performance report form at annexe G and return it to us Contact details Our Customer Service Centre will be pleased to deal with your enquiries Customer Service Centre Ordnance Survey Adanac Drive SOUTHAMPTON SO16 0AS General enquiries calls charged at local rate 44 0 8456 05 05 05 Dedicated Welsh Language HelpLine 08456 05 05 04 Textphone deaf and hard of hearing users only please 44 0 23 8005 6146 customerservices ordnancesurvey co uk www ordnancesurvey co uk This document has been screened in accordance with Ordnance Survey s Equality scheme If you have difficulty reading this information in its current format and would like to find out how to access it in a different format Braille large print computer disk or in ano
79. ed as a theme to a view this file is displayed as a feature table sbn and sbx the files that store the spatial index of the features These two files will only exist if you perform theme on theme selection spatial joins or create an index on a theme s SHAPE field prj the file that stores the projection information Structure of Boundary Line in Shapefile Area features Area features are polygons with attributes added Link features MHW Links represent all linear features that is boundaries extent of the realm and mean high water springs mark All links are broken when they intersect with one another The first and last coordinate pairs in a link correspond exactly with the end coordinates of the adjoining link s Links may comprise up to several thousand line segments Coordinate system The coordinate system is National Grid NG The National Grid coordinates are to a resolution of 0 1 metre This is the resolution of the source data Boundary Line technical specification chapter 3 v1 18 09 2013 Crown copyright 57 of 94 Shapefile table structures Regions Polylines Title Type Title Type FID Object ID FID Object ID SHAPE Geometry SHAPE Geometry NAME Text CODE Text AREA CODE Text DESCRIPTO Text DESCRIPTO Text FILE NAME Text FILE NAME Text NUMBER Double NUMBER Double LINK ID Double NUMBERO Double POLYGON ID Double UNIT ID Double CODE Text HECTARES Double AREA D
80. ed date will be the day before the next dissolution of Parliament or the day before the next European Assembly election in the United Kingdom Boundaries are no longer shown in Boundary Line if they have been superseded at the time of the annual snapshot of boundaries that each release of Boundary Line represents Survey change When changes occur to tidelines rivers or streams caused by natural and gradual forces any boundaries that are linked to these altered features will move with them When the movement of a boundary MHW or EOR alignment in Boundary Line reflects such changes this will be noted in the update notes that accompany each release of Boundary Line Unannexed areas This is an area within the realm that is not included in all the relevant administrative units The area will remain unannexed until further legislation changes its situation and the polygon represents a hole in that level of administration Unitary authorities Unitary authorities and counties effectively create a contiguous layer of administrative units throughout the whole of Great Britain They represent single tier administrations with responsibility for all areas of local government The coastline and associated items Extent of the realm EOR The external bounding line of the Boundary Line dataset is the extent of the realm This means the boundary extent is digitised on the alignment of the mean low water springs MLWS for the seaward extent Bo
81. ernment hierarchies The three tier system remains unchanged the two tier system has unitary authorities replacing the county and district levels of administration Unitary authorities may be divided into civil parishes or communities except in Scotland and unitary authority wards or unitary authority EDs for voting purposes In Wales the voting area is the unitary authority ED in Scotland it is the unitary authority ward and in England it is the unitary authority ward or unitary authority ED England also has metropolitan districts these have no county administration These districts are divided for voting purposes into metropolitan district wards With the introduction of the regional government for London in this document called the Greater London Authority the proportional representation voting area for this new administration is the Greater London Authority Assembly constituency The existing London borough structure also has a relationship with the new Greater London Authority and each London borough is divided for voting purposes into London borough wards Scotland is divided into parliamentary constituencies for voting purposes to elect Members of the Scottish Parliament MSPs The Scottish parliamentary electoral region is a grouping of Scottish parliamentary constituencies Wales is divided into assembly constituencies for voting purposes to elect assembly members AMs to the Welsh Assembly The Welsh Assembly electoral region
82. es Valley and Durham Hartlepool and Stockton on Tees Hartlepool Stockton on Tees South Teeside Middlesbrough Redcar and Cleveland Darlington Darlington County Durham County Durham Northumberland and Northumberland Northumberland Tyne and Wear Tyneside Gateshead Newcastle upon Tyne North Tyneside South Tyneside Sunderland Sunderland Scotland Eastern Scotland Angus and Dundee City Angus Dundee City Clackmannanshire and Fife Clackmannanshire Fife East Lothian and Midlothian East Lothian Midlothian Scottish Borders Edinburgh City of Falkirk Perth amp Kinross and Stirling West Lothian Scottish Borders Edinburgh City of Falkirk Perth amp Kinross and Stirling West Lothian Highlands and Islands Caithness amp Sutherland and Ross amp Cromarty Inverness amp Nairn West Moray and Badenoch amp Strathspey Lochaber Skye amp Lochalsh Arran amp Cumbrae and Argyll amp Bute Eilean Siar Western Isles Orkney Islands Shetland Islands Caithness and Sutherland Ross and Cromarty Badenoch and Strathspey Inverness and Nairn West Moray Argyll and Bute UA Islands Argyll and the Islands LEC Mainland Arran and the Cumbraes Lochaber Skye and Lochalsh Eilean Siar Western Isles Orkney Islands Shetland Islands North Eastern Scotland Aberdeen city Aberdeenshire and North East Moray East Dunbartonshire West Dunbartonshire and Helensburgh amp Lomond Aberdeen city Aberdeenshire No
83. es do not come into operation on a defined date see effective date and operative dates and it is therefore difficult to timetable such changes into the spring or autumn updates Therefore any forthcoming Westminster constituency parliamentary boundary changes that have been approved by Government will be supplied as a separate file in MapInfo or ESRI formats only as part of the updates until they are included in the product Boundary Line user guide chapter 1 v1 18 09 2013 Crown copyright Page 7 of 94 Chapter2 Overview of Boundary Line Data overview Basic principles Boundary Line is the key dataset of administrative and voting boundaries in Great Britain It is a representation in computer readable form of a specialist large scale map including real world objects which may be tangible such as the mean high water mark or intangible such as a district boundary GIS software provides the functionality to store manage and manipulate this digital map data The properties of the data make it suitable as a key base for users wishing to develop applications Boundary Line is also suitable for use within other digital mapping systems Boundary Line is coordinated on the National Grid which allows for the easy superimposition of other datasets Links represent all linear features that is boundaries extent of the realm EOR and mean high water springs mark MHW They are strings of coordinated line segments and have relationship
84. escription of the attributes that can be applied to features within the transfer set 3 Feature Classification Record FEATCLASS which gives the MHW feature code 4 Code List Record CODELIST which lists and describes the coded values that appear in the attribute records AC NB and TY These introductory records are followed by the data Section records The section consists of two parts 1 Section Header Record SECHREC this gives the National Grid coordinates of the section and 2 Section body this comprises all the features within the section Section body data Line feature Each line feature is represented by the use of the following records e Line Record LINE REC e Geometry Record GEOMETRY 1 and e Attribute Record ATTREC Chain feature Each chain feature is represented by the use of the following records e Chain Record CHAIN e Geometry Record GEOMETRY 1 and e Attribute Record ATTREC Each chain feature is in the data only once One to many geometry records represent one chain record There is one attribute record to each geometry record Boundary Line technical specification chapter 4 v1 18 09 2013 Crown copyright 67 of 94 Polygon feature Each polygon feature is represented by the use of the following records e Polygon Record POLYGON e Chain Record CHAIN and e Attribute Record ATTREC Each polygon feature is in the data only once One polygon record represent
85. ew Forest District was 24UJ and Milford Ward 24UJHM Types of units will be distinguished by the first three alohanumeric characters entity code E for England and so on 10 counties 07 districts 05 wards and so on New administrations will be allocated the next available number within its type County ED code is set at 999999999 The code is blank when the administrative unit does not have a code for example non civil parish areas Operative dates This is a calendar date given in an Order Act or Statutory Instrument on which the specified boundary changes will come into operation Dates given may be up to four years after the publication of the Order Act or Statutory Instrument and may apply to any type of boundary other than parliamentary or European regions The Westminster parliamentary constituency boundaries have an Effective date rather than an Operative Date The Effective Date will be the date of a general election meaning any changes to these boundaries will apply as and from the date of the next election Order Act or Statutory Instrument A document signed by the relevant Secretary of State or a local authority letter describing and giving legal authority for boundary changes Other Acts and Orders can effect the addition of new boundary information for example seaward extensions and harbour acts Superseded date This is the last date on which a boundary was current Where an effective date applies the supersed
86. except at the start or end via common shared terminating nodes points All links contain their terminating coordinates Links may form the boundaries of polygons and may be shared between polygons link and node data A form of vector data in which linear features are represented as links Links are terminated where they intersect other links These intersection points and link ends may carry nodes whose feature records express the geometric relationships between links link and node structure A data structure in which links and nodes are stored with cross referencing link segment A straight line or vector between two coordinated points logical record A logical record contains all the information relating to a data entity for example a feature record A logical record may comprise one or more physical records map generalisation A reduction in map detail so that the information remains clear and uncluttered when the map scale is reduced May also involve re sampling to larger spacing and or a reduction in the number of points in a line map header Data at the start of the digital map file describing that data It may contain information on the source and history of the geometric data within the map and the coordinate system in use as well as holding information essential to the management of Ordnance Survey s digital mapping system map scale The ratio between the extent of a feature on the map and its extent on the ground n
87. gstoke and Deane East Hampshire Eastleigh Fareham Gosport Hart Havant New Forest Rushmoor Test Valley Winchester Isle of Wight Medway 600066600 00 000000 6 6 6 Boundary Line user guide annexe D v1 18 09 2013 Crown copyright 38 of 94 NUTS 1 NUTS 2 NUTS 3 LAU 1 areas East of England Kent East Anglia Kent CG Peterborough Cambridgeshire CC Norfolk Suffolk Ashford Canterbury Dartford Dover Gravesham Maidstone Sevenoaks Shepway Swale Thanet Tonbridge and Malling Tunbridge Wells Peterborough Cambridge East Cambridgeshire Fenland Huntingdonshire South Cambridgeshire Breckland Broadland Great Yarmouth King s Lynn and West Norfolk North Norfolk Norwich South Norfolk Babergh Forest Heath Ipswich Mid Suffolk St Edmondsbury Suffolk Coastal Waveney Bedfordshire and Hertfordshire Luton Bedford Central Bedfordshire Hertfordshire Luton Bedford Central Bedfordshire Broxbourne Dacorum East Hertfordshire Hertsmere North Hertfordshire St Albans Stevenage Three Rivers Watford Welwyn Hatfield Essex Southend on Sea Thurrock Essex CC Southend on Sea Thurrock Basildon Braintree Brentwood Castle Point Chelmsford Colchester Epping Forest Harlow Maldon Rochford Tendring Uttlesford Kiw5Gpaww
88. ications at hand The data model would normally define specific groups of entities and their attributes and the relationship between these entities A data model is independent of a computer system and its associated data structures map is one example of an analogue data model data quality Attributes of a dataset that define its suitability for a particular purpose for example completeness positional accuracy currency logical structure and so on dataset Data as supplied in a particular format to customers whether internal or external to Ordnance Survey data structure The defined logical arrangement of data as used by a system for data management a representation of a data model in computer form derived map A map which has been produced by reference to other source maps rather than directly from a survey digital Data which is expressed as numbers digits in computer readable form is said to be digital distinctive name A text feature consisting of text string s which form s a proper name eastings See rectangular coordinates entity Something about which data is stored in a databank or database For example boundary and name The data may consist of relationships attributes positional and shape information and so on Often synonymous with feature explicit Data that is directly represented in digital form For example the relationship between two objects is explicit if recorded by such means as pointers and d
89. ine user guide annexe v1 18 09 2013 Crown copyright 30 of 94 Wales Abertawe Swansea Sir Ddinbych Denbighshire Blaenau Gwent Blaenau Gwent Sir Fynwy Monmouthshire Bro Morgannwg the Vale of Glamorgan Caerffili Caerphilly Sir Gaerfyrddin Carmarthenshire Sir y Fflint Flintshire Casnewydd Newport Tor faen Torfaen Castell nedd Port Talbot Neath Port Talbot Conwy Conwy Wrecsam Wrexham Sir Ynys Mon Isle of Anglesey Merthyr Tudful Merthyr Tydfil Gwynedd Gwynedd Pen y bont ar Ogwr Bridgend Powys Powys Caerdydd Cardiff Sir Ceredigion Ceredigion Rhondda Cynon Taf Rhondda Cynon Taff Sir Benfro Pembrokeshire West Midlands Shropshire Dudley metropolitan district Staffordshire county Sandwell metropolitan district Warwickshire county Solihull metropolitan district Worcestershire county Walsall metropolitan district Birmingham metropolitan district City of Stoke on Trent City of Wolverhampton metropolitan district County of Herefordshire Coventry metropolitan district Telford and Wrekin Yorkshire and t he Humber North Yorkshire county Barnsley metropolitan district Sheffield metropolitan district Wakefield metropolitan district Bradford metropolitan district City of Kingston upon Hull Calderdale metropolitan dist
90. le in Boundary Line an administrative unit boundary is represented by a county area boundary Boundary Line user guide chapter 3 v1 18 09 2013 Crown copyright Page 16 of 94 Ceremonial counties A ceremonial county is an area that has an appointed Lord Lieutenant and High Sheriff Ceremonial counties are not explicitly represented in Boundary Line Detached parts The description Detached Det only applies to portions of local government or parliamentary constituency areas which are separated from the main area being completely surrounded by other local government or parliamentary constituency areas and not connected by direct access on the ground The description will not be applied to islands or parts of islands in the sea Detached parts have the same Al attribute and GSS code where applicable as the main area Divorcement Part of a boundary separated from another originally on the same alignment Divorcements are created by the revision of one boundary and not the other Figure 3 3 divorced boundaries Cardiff South and Penarth Boro Const Vale of Glamorgan Vale of Glamorgan Co Const Cardiff Figure 3 3 shows a boundary divorcement The unitary boundary between Vale of Glamorgan and Cardiff has been realigned whilst the parliamentary Westminster constituency boundary has remained in its original position It is likely that the parliamentary Westminster constituency boundary will also be realigned at
91. may be 5 metres or worse Boundary Line technical specification annexe v1 18 09 2013 Crown copyright Page 92 of 94 section In NTF terminology a subdivision of a database In Ordnance Survey terms this equates to a single map unit that is a digital map file or a tile seed point A coordinated point isolated node within an area usually a defined polygon to which alphanumeric information may be attached as an attribute for example a name or feature code Also called a polygon seed area seed or representative point segment A chord defined by two consecutive coordinates in a line string source scale The scale of the source information from which the map was digitised The scale of survey for a basic scale map or the scale of the source map for a derived map spatial data Data that includes a reference to a two or three dimensional position in space as one of its attributes It is used as a synonym for geometric data Statutory Instrument An order made by a Minister under delegated power from Parliament Contains changes to boundary information the alignment type or relationship to a named area amalgamation or a change of name to an area are made by order string 1 Asetof items which can be arranged into a sequence according to a rule 2 Asequence of coordinate pairs or triplets making up a line or a link structured data Data within which collections of features of any type form objects Topographically
92. me Westward Ho Ward includes the exclamation mark but Ynys M n is shown as Ynys Mon Each administrative area also carries a unique identifier known as the Admin area identifier or Al The same Al attribute is attached to every component forming part of an administrative area for example MILTON CP and MILTON CP Det 1 Government Statistical Service GSS codes See chapter 3 of the user guide Boundary Line explained The GSS codes are conveyed in the OP attribute of the Collection of Features Record COLLECT Record size NTF data is written to the media in variable length records with a maximum record length of 80 characters which includes any continuation mark CONT MARK and end of record EOR which should not be confused with EOR meaning extent of the realm Record terminator EOR The end of record terminator is the percent character 90 ASCII code 37 for both formatted and unformatted media Other features Each polygon carries the following attributes PI polygon ID a number unique to the polygon for example 070087 and HA area of polygon recorded to a precision of 0 001 hectare Each link carries the following attributes where relevant LK link ID a number unique to the link for example 0000064368 and FC selected links carry feature code 0071 for MHW Each administrative area collection of polygon features carries the following attributes where relevant administrative unit ID number unique to
93. mm erba oem Over dom Ollie e omae 12345678901234567890123456789012345678901234567890123456789012345678901234567890 T p p err rm Template NOTE POLY ID CHAIN 1D ID are the same variable number Boundary Line technical specification chapter 5 v1 18 09 2013 Crown copyright Page 81 of 94 Complex Polygon Record CPOLY 33 Field Position Format REC DESC 01 02 A2 CPOLY ID 03 08 16 NUM PARTS 09 12 l4 POLY ID 13 18 16 SIGN 19 19 1 GEOM ID mm l6 NUM ATTS Pu 12 ATT ID 16 11 EOR 1 variable integer Record example Content 33 Variable number Variable number OF 000000 01 Variable number or 1 338008840002800614 800865 000000018008840 s ypas bua ell 34s v vu ras Description Record descriptor Unique ID in file for complex polygons Reference to PART ID in Collect Record that is preceded by a value of 33 in DESC Number of iterations of POLY ID and SIGN Cross reference to POLY 10 in Polygon Record For containing polygons or for contained polygons respectively The number of attribute identifiers that follow Cross reference to 0 in Attribute Record No further records or continuation record follows Record terminator i999 92 ere Dee Ss ee ede 1234567890123456789012345678901234567890123456
94. n as The Inner and Middle Temples are within the City of London only for some purposes They are not shown in Boundary Line but their areas have been wholly included within the city and its wards for this dataset There are two distinct areas with other areas held jointly and the boundaries are so intermixed that they have never been published by Ordnance Survey separately A record of these boundaries is however held in the Boundary Record Library for reference purposes Parish community wards Divisions of parishes England and communities Wales not included in Boundary Line Lands common to These are areas where the limits of the parishes concerned have not been determined and the area itself is common to or belongs to two or more parishes In Boundary Line they are classified as separate parishes with the name LANDS COMMON TO THE PARISHES OF applied sometimes abbreviated to LCPs These areas are allocated their own Al attributes and so on Figure 3 4 an example of lands common to ATWORTH CP BROUGHTON GIFFORD CP LCPs of BROUGHTON GIFFORD and MELKSHAM WITHOUT CP MELKSHAM WITHOUT CP HILPERTON CP SEMINGTON CP River Dee The boundary between Wirral metropolitan district in the former county of Merseyside and Cheshire West and Chester unitary authority in the former county of Cheshire and the Flintshire unitary authority area has not been determined and the line adopted in Boundary Line is for the
95. n in which they appear These polygons within the data model also have associated attributes these give the entities meaning representing the geometric characteristic of an entity with items such as area or a unique identity Boundary links are classified indirectly by the polygon chains in which they appear Administrative or electoral voting units polygons and links are assigned unique identifiers for each release of Boundary Line technical specification chapter 1 v1 18 09 2013 Crown copyright 52 of 94 Chapter2 Maplnfo An overview of Boundary Line formats MapInfo MID MIF The transfer format is as defined by the MapInfo Professional User s Guide MIF Export MapInfo Interchange Format MIF is an ASCII file format that can fully describe MapInfo database Both graphic and tabular data are exported into MIF files The graphic data is in a file with a mif extension and the tabular data is in a file with a mid extension MapInfo Interchange Format files can be translated into other formats with other programs An overview of the data structure of a Boundary Line file in MID MIF is shown below Files listed below are supplied in the Data folder on the CD Ae The files below are created for each layer as they are imported into Maplnfo County DAT County ID County MAP County TAB Mapinfo TAB TAB files Maplnfo tables are the native format of Maplnfo They
96. nding administrative or voting area s polygon The current values are as follows Name Code Civil parish or community CPC County CTY County electoral division CED Unitary authority electoral division UTE Unitary authority ward UTW Boundary Line technical specification chapter 4 v1 18 09 2013 Crown copyright 65 of 94 OP CENSUS_CODE This attribute is conveyed in the Attribute record for the collection of features and provides the GSS code allocated by ONS or GROS to the administrative unit See chapter 3 Boundary Line explained in the user guide for details of the structure and meaning of the codes Where the code is unavailable to Ordnance Survey the attribute value is set to 999999999 PI GLOBAL POLYGON ID A unique identifier for every polygon Each PI attribute is unique to the entire Boundary Line dataset TY AREA TYPE A code allocated by Ordnance Survey to indicate the type of area The current values are as follows Name Type Description Civil administrative area AA Applied to the set of administrations for civil organisation Civil voting area VA The set of voting areas for civil administrations Filler area FA Topographic area TA Judicial area JA Explicit administration and or voting area relationships The COLLECT record has been expanded to show the relationships between administrations and the administrations voting areas expli
97. nged NOTE is designed to transfer any geographic data therefore there is no standard order of records This description of the order of records is specifically for the transfer of Boundary Line data Boundary Line technical specification chapter 4 v1 18 09 2013 Crown copyright Page 68 of 94 Link feature LINEREC GEOMETRY 1 ATTREC for completed file followed by Polygon feature POLYGON Polygon ATTREC CHAIN and or Complex polygon feature POLYGON Repeating CHAIN CP OLY ATTREC Complex polygon Collection of features COLLECT Collection of features ATTREC for completed file Section body record structure Complex polygon records are included only to deal with polygons with holes as described elsewhere Otherwise all records are compulsory for all transfers Figure 5 2 hierarchy of records COLLECT Admin unit ATTREC POLYGON AVOPINM NB CPOLY Part Polygon AC TY NA Complex Polygon ATTREC ATTRECJ TTRE CHAIN PINA POLYGON LINEREC CHAIN links LINEREC p om ATTREC LK HW Data supply structure Supply of data on formatted media Boundary Line data is not blocked but is written directly to the output device The transfer set has one dataset and one section One or more transfer sets are put onto the medium 01 VOLUME HEADER RECORD 01 02 DATABASE HEADER RECORD 40 ATTRIBUTE DESCRIPTION RECORD
98. oS guar Boundary Line User guide and technical specification Boundary Line User guide Contents Section Preface Chapter 1 Chapter 2 Chapter 3 Page no 4 Contact tee etr eia 4 BET SOIT 4 Purpose u uuu u x E 4 Copyright in this 4 Data copyright and other intellectual property 5 Trademarks u uuu xu a u Saa 5 Backup provision of the 5 roc 5 An introduction to Boundary Line ULU 6 Boundary Lirie benefits 1 re ct ee dece ee 6 Boundary Lirie applications 2 ainsi entre er nette Edere 6 Requirements to utilise 7 aL Limp 7 LEE 7 Transter ull 7 Clo 7 Mesi 7 Overview Of Boundary Line u L aS oa Ease sassa sss 8 BICEoUIUIU 8 Basic
99. ocument accompanying each release of Boundary Line Resolution The resolution of the coordinate system is 0 1 m However it is not possible to calculate meaningful accuracy limits for Boundary Line data due to both the graphic nature and scale of the primary source 1 10 000 scale published mapping Such mapping is subject to limited map generalisation where an impression of the ground detail is made due to the complexity of the detail and importance of certain features such as roads This means that boundary alignments are cartographically represented in areas where accurate positional representation would be impossible Boundary Line is derived from the basic scale of 1 10 000 The relationship of boundaries to ground detail mirrors the accuracy achieved on the source Ordnance Survey 1 10 000 scale OS Landplan A consequence of this is if Boundary Line is superimposed upon boundaries in OS MasterMap topographic data variations in the two alignments will be seen Completeness Completeness is a measure of the correspondence between the real world and the specified data content During digitising all Boundary Line data is checked thoroughly against source documents to ensure as far as reasonably possible that no features have been omitted or misaligned Boundary Line technical specification chapter 1 v1 18 09 2013 Crown copyright 51 of 94 Boundary Line data properties Boundary Line is a structured link and polygon dataset
100. oduct version Each version of Boundary Line is defined by a unique product specification The product specification can be found in Boundary Line data in the FCNAME field of the Database Header Record DBHREC This technical sheet reflects the product specifications current at the time of its production which are as follows Product Boundary Line Product specification A20N_FC Product version date October 2013 Product version BL2013 v2 The FCDATE field of the Database Header Record DBHREC indicates the effective date of this product specification Product release Boundary Line updates are released twice a year spring and autumn The updates represent boundaries as defined and modified by Orders Acts and Statutory Instruments as at a date that falls typically during the first week of the preceding May This date appears in each Section Header Record SECHREC in the SURV_DATE field The copyright date of each release is the same as the SURV_DATE and is shown in each Section Header Record SECHREC in the COPYRIGHT field NTF version The current version is NTF v2 0 Level 3 and will be supplied until further notice The NTFVER field of the Volume Header Record VOLHDREC indicates the NTF version The effective date of the definition of NTF v2 0 in Boundary Line is 15 May 1992 and is indicated by the DDATE field of the Database Header Record DBHREC Specific Boundary Line NTF information Area measurement A
101. oes not have to be deduced by further analysis of the data feature An item of detail within a map that can be a point and or symbol text or line feature NTF The formal representation of an object A simple feature or primitive exists in NTF when a point line complex line polygon text string or external record is created with or without associated attribute records A complex feature exists in NTF when a group of simple and or complex feature records are combined in a complex polygon or collection of features record with or without associated attribute records feature classification record A specific named NTF record FEATCLASS that lists the feature codes in use in the current database feature code FC An alphanumeric attribute code used in digital map data to describe each feature in terms either of the object surveyed or its representation on the map or both feature record The logical information both spatial and attribute describing a feature or entity feature serial number FSN A number used as a feature identifier usually allocated on a sequential basis Boundary Line technical specification annexe v1 18 09 2013 Crown copyright Page 89 of 94 field A specified part of a record containing a unit of data such as the date of digitising The unit of data may be a data element or a data item In NTF a field is a subdivision of a physical record Every field has a name and a predefined interpretation
102. oral areas and are wholly included within the district of Windsor and Maidenhead and its wards Government Office Regions GORs Government Office Regions are not represented as specific boundary features in Boundary Line however the boundaries that are used to define the GORs are represented as European regions A full list of the counties and unitary authorities that represent each European region which the GORs are based on are listed at annexe B Additional GOR information can be found at www statistics gov uk official This will identify the GORs defined by the Office for National Statistics which only covers England We have also included Scotland and Wales European Regions to complement the product s GB coverage NOTE The Government Office Network closed on 31 March 201 1 Honorary titles Honorary titles granted to local government areas such as city and town are not included in Boundary Line Boroughs in England have been identified as from the October 2006 release with B in the file name and B in the Name attribute for example CITY SOUTHAMPTON B File name CITY OF SOUTHAMPTON B NAME attribute The borough B will only be depicted on unitary authorities district and metropolitan districts This addition is to purely denote which boundaries have borough status in England without creating polygons or altering the specification in any way National boundaries The boundaries between England and Wales and Engl
103. ording to the dataset specification against the real world or reference dataset Boundary Line user guide chapter 4 v1 18 09 2013 Crown copyright Page 24 of 94 Annexe Change update Statutory Instruments SI and 5 changes in October 2013 Boundary Line release England SI SI District Unitary Authority County ILondon Borough year comments Metropolitan District if applicable EAST HERTFORDSHIRE HERTFORDSHIRE 01 Apr 2013 2013 596 District Order STEVENAGE GATESHEAD Met District Unitary NORTHUMBERLAND 01 Apr 2013 2013 595 Order NORTHAMPTONSHIRE NORTHAMPTON 01 Apr 2013 Parish Order Elstow Ward renamed Elstow BEDFORD 27 Mar 2013 N A N A and Stewartby Latimer CP renamed BUCKINGHAMSHIRE CHILTERN 09 Apr 2013 Latimer and Ley Froxfield CP renamed HAMPSHIRE EAST HAMPSHIRE 09 May 2013 N A N A Froxfield and Privett Runhall CP renamed NORFOLK SOUTH NORFOLK 28 Jan 2013 N A N A Brandon Parva Coston Runhall and Welbourne Wootton Bassett CP WILTSHIRE 01 Apr 2013 N A N A renamed Royal Wootton Bassett NORTHUMBERLAND 01 Oct 2013 N A N A Amend ED bdy CORNWALL 01 Oct 2013 N A N A Amend ED bdy ROTHERHAM 01 Oct 2013 N A N A Amend CP bdy MEDWAY 01 Oct 2013 N A N A Amend MHW CUMBRIA ene 01 Oct 2013 N A N A Amend MHW GREATER ME 01 Oct 2013 N A Amend County bdy tec ER 01Oc
104. ormally expressed as a representative fraction such as 1 1250 or 1 10 000 name The proper name or label of an object real world or feature object abstraction The descriptive name might consist of one or more text strings or be an attribute of the object or object abstraction National Grid A unique referencing system that can be applied to all Ordnance Survey maps of Great Britain GB at all scales It is used by Ordnance Survey on all post war mapping to provide an unambiguous spatial reference in Great Britain for any place or entity whatever the map scale The National Grid is defined by the OSGB369 spheroid NTF A format designed in 1988 specifically for the transfer of spatial information it is published as British Standard BS 7567 and is administered by the British Standards Institution see chapter 4 of the technical specification NTF explained node An object representation of a point which either does not form any part of a link isolated node or polygon seed point or the representation of a point at the start or end of a link terminating node The position of a node is defined by a single coordinate pair which is repeated within all links logically connected at that node and or containing it A node is only deleted if the link containing it as a terminating node is deleted northings See rectangular coordinates object A collection of entities which form a higher level entity within a specific data model Bo
105. ottish parliamentary electoral region named in the file the following will appear in COLLECT COLL ID to its related Scottish parliamentary constituencies For each Welsh Assembly electoral region named in the file the following will appear in the COLLECT record COLL 10 to its related Welsh Assembly constituencies Boundary Line technical specification chapter 4 v1 18 09 2013 Crown copyright Page 66 of 94 e For each European region named in the file the following will appear in the COLLECT record None there is currently no administrative voting level below European region For each Westminster constituency named in the file the following will appear in the COLLECT record None there is currently no administrative voting level below Westminster constituency Transfer set structure Boundary Line data is in one or more transfer sets A transfer set equates to a single file Volume records Each transfer set starts with a Volume Header Record VOLHDREC and terminates with a Volume Termination Record VOLTERM Database records The beginning of each transfer set is structured with the following introductory or leading records 1 Database Header Record DBHREC which gives details of e the database name e NTF release date e feature classification table name and e the release date which applies to the whole of the transfer set 2 Attribute Description Record ATTDESC which lists and gives a d
106. ouble TYPE CODE Text DESCRIPTO Text TYPE CODO Text DESCRIPT1 Text NOTE these fields are not in the data as they are virtual columns created by ArcGIS when accessing the table contents The FID column uniquely identifies each object stored in the table The SHAPE column provides information about the feature geometry Example field record for Shapefile County FID 14 SHAPE Polygon NAME Lancashire County AREA CODE DESCRIPTO County FILE NAME LANCASHIRE COUNTY NUMBER 32 NUMBERO 1139 POLYGON ID 121912 UNIT ID 5156 CODE E10000017 HECTARES 308341 05 AREA 17906 126 TYPE CODE DESCRIPTO CIVIL ADMINISTRATION AREA TYPE CODO DESCRIPT1 Boundary Line technical specification chapter 3 v1 18 09 2013 Crown copyright Page 58 of 94 FID 0 SHAPE Polygon NAME Buckinghamshire AREA CODE CTY DESCRIPTO County FILE NAME BUCKINGHAMSHIRE NUMBER 14 NUMBERO 648 POLYGON ID 51776 UNIT_ID 11901 CODE E10000002 HECTARES 156493 AREA 0 TYPE CODE DESCRIPTO CIVIL ADMINISTRATION AREA TYPE_CODO DESCRIPT1 Example field record for Shapefile Mean high water FID 2855 SHAPE Polyline CODE 0071 DESCRIPTO High FILE NAME HAMPSHIRE COUNTY NUMBER 1607 LINK ID 75762 NOTE these fields are not in the data as they are virtual columns created by Arc
107. r FIELD_NAME 03 12 A10 lt 10S gt Not used 13 14 A2 AC TY or NB Two letter mnemonic FINTER 15 19 A5 A2 lt 3S gt or A3 3S Format of CODE VAL where 3S denotes three spaces following the text NUM CODE 20 22 I3 Variable number Number of codes defined in list CODE VAL 23 A The code DIVIDER i A1 Divider used to terminate variable length text fields CODE_DES X A Description of the code DIVIDER a A1 Divider used to terminate variable length text fields CONT_MARK k 11 0 No further records or 1 or continuation record follows EOR T A1 96 Record terminator variable integer Record examples 42 028CPCNCIVIL PARISH COMMUNITYNCPWNCIVIL PARISH OR COMMU1 WARD CTY COUNTY CED COUNTY ELECTORAL DIVISION DIS DISTRICT DIW DISTRIC1 OOT WARD EUR EUROPEAN REGIONNGLANGREATER LONDON AUTHORITY LAC GREATER LONDON 1 OOAUTHORITY ASSEMBLY CONSTITUENCYNLBONLONDON BOROUGH LBW LONDON BOROUGH WARD 1 OOMTC METROPOLITAN COUNTY MTD METROPOLITAN DISTRICT MTW METROPOLITAN DISTRICT1 00 WARD NAT NATION NCP NON CIVIL PARISH OR COMMUNITY NPW NON CIVIL PARISH OR 1 OOCOMMUNITY WARD PSD PETTY SESSIONAL DIVISION RLM REALM SPC SCOTTISH PARLIAME1 OONT CONSTITUENCYNSPENSCOTTISH PARLIAMENT ELECTORAL REGIONNSEANSEANUTANUNITAR1 00 AUTHORITYNUTENUNITARY AUTHORITY ELECTORAL DIVISION UTW UNITARY AUTHORITY 1 OOWARD WAC WELSH ASSEMBLY CONSTITUENCYNWAENWELSH ASSEMBLY ELECTORAL REGION WM1 OOC WESTMINSTER CONSTITUENCY 0 42 TYA2 O05
108. rally included in the local government and parliamentary areas If separate they are not part of the local government and parliamentary area unless they are placed therein by legislation of some kind for example Plymouth breakwater is included in the local government area whilst the centre portion of the Portland Harbour breakwater is not Permanent or solid structures in the sea such as the forts in the Solent off Portsmouth Harbour and Brighton Marina are usually included in local government and parliamentary areas Boundary Line user guide chapter 3 v1 18 09 2013 Crown copyright Page 23 of 94 Chapter 4 Data measures Ordnance Survey measures the data in its products in one or more of the ways set out in table 1 below Table 1 Definitions of data measures Data measure Definition Sub measure Definition Completeness Presence and Omission Features representing objects that conform absence of to the specified data content but are not features against present in the data qala Commission Features representing objects that do not content conform the specified data content but present in the data Logical Degree of Conceptual How closely the data follows the conceptual consistency adherence to logical rules of data structure attribution and relationships consistency rules or model Domain consistency How closely the data values in the dataset match
109. rea measurements are delivered for each polygon and complex polygon in each file and include the foreshore and tidal water They are quoted to a precision of 0 001 hectares which is the current DCLG specification The accuracy of the measurement is dependent upon the source data used see Resolution Coordinates Coordinate values and the number of coordinate pairs in a feature are transferred in the Geometry Record GEOMETRY 1 All coordinates are expressed as strings of eight numeric characters for the eastings and eight numeric characters for the northings Where appropriate leading zeros are present to complete the eight characters All coordinates are full National Grid coordinates measured from the National Grid origin Link features Links represent all linear features that is boundaries extent of the realm and mean high water springs mark Link features are transferred in the Geometry Record GEOMETRY All links are broken when they intersect with one another The first and last coordinate pairs in a link correspond exactly with the end coordinates of the adjoining link s Links may comprise up to several thousand line segments Boundary Line technical specification chapter 4 v1 18 09 2013 Crown copyright Page 61 of 94 Names The distinctive name of an administrative area is conveyed by way of the NM attribute of the Collection of Features record Punctuation is shown in names but not accentuation for example the na
110. rict Doncaster metropolitan district East Riding of Yorkshire North East Lincolnshire Kirklees metropolitan district North Lincolnshire Leeds metropolitan district Rotherham Metropolitan District York Boundary Line user guide annexe v1 18 09 2013 Crown copyright Page 31 of 94 Annexe Boroughs Previously the reference to boroughs has not been included in the Boundary Line product In striving to improve the product and at the request of the end users the inclusion of a reference to the boroughs will enable users to search within their GIS and locate them more easily This addition was introduced in October 2006 These additions only apply to England and affect the districts that have been granted Charters of Incorporation Col unitary authorities that have been created from previous districts with Col and metropolitan districts that have borough status The tables below identify where _ B has been added to the file name and B to the boundary data This addition does not affect the structure or specification of the product and will not impact on your GIS or translation software Metropolitan districts 36 Borough status all Y BARNSLEY DISTRICT Y BIRMINGHAM DISTRICT BOLTON DISTRICT BRADFORD DISTRICT BURY DISTRICT CALDERDALE DISTRICT CITY OF WOLVERHAMPTON DISTRICT COVENTRY DISTRICT DONCASTER DISTRICT DUDLEY DISTRICT GATESHEAD DISTRICT KIRKLEES DISTRICT KNOWSLEY DISTRICT LEEDS DISTR
111. rth East Moray East Dunbartonshire Helensburgh and Lomond West Dunbartonshire Boundary Line user guide annexe D v1 18 09 2013 Crown copyright 42 of 94 South Western Scotland Dumfries amp Galloway East Ayrshire and North Ayrshire mainland Glasgow city Inverclyde East Renfrewshire and Renfrewshire North Lanarkshire South Ayrshire South Lanarkshire Dumfries amp Galloway East Ayrshire North Ayrshire mainland Glasgow city East Renfrewshire Inverclyde Renfrewshire North Lanarkshire South Ayrshire South Lanarkshire NUTS 1 Wales West Midlands NUTS 2 West Wales and The Valleys East Wales Herefordshire Worcestershire and Warwickshire NUTS 3 Isle of Anglesey Gwynedd Conwy and Denbighshire South West Wales Central Valleys Gwent Valleys Bridgend and Neath Port Talbot Swansea Monmouthshire and Newport Cardiff and the Vale of Glamorgan Flintshire and Wrexham Powys Herefordshire county of Worcestershire Warwickshire LAU 1 areas Isle of Anglesey Gwynedd Conwy Denbighshire Carmarthenshire Ceredigion Pembrokeshire Merthyr Tydfil Rhondda Cynon Taff Blaenau Gwent Caerphilly Torfaen Bridgend Neath Port Talbot Swansea Monmouthshire Newport Cardiff The Vale of Glamorgan Flintshire Wrexham Powys Herefordshire county of Bromsgrove Malvern Hills Redditch Worcester Wychavon Wyre Forest
112. s one chain record There is one attribute record to each polygon record NOTE if the polygon record is part of a complex polygon record then the polygon record does not reference an attribute record Complex polygon feature Each complex polygon feature is depicted by the use of the following records e Complex Polygon Record CPOL Y e Polygon Record POLYGON and e Attribute Record ATTREC Each complex polygon feature is in the data only once More than one polygon record is required for each complex polygon record There is one attribute record to each complex polygon record Collection of features Each collection of features is depicted by the use of the following records e Collect Record COLLECT e Polygon Record either and POLYGON e Complex Polygon Record either CPOLY e Collect Record optional COLLECT and e Attribute Record ATTREC The collection of features must have at least one polygon record or complex polygon record A collect record is a combination of zero to many polygon records and or zero to many complex polygon records and zero to many collect records There is one attribute record to each collect record Section body records Geometry Record GEOMETRY 1 contains the coordinate position s to 0 1 m of the feature Line features contain two to many pairs Geometry continuation records contain any further coordinates required to complete a line feature How the section body data is arra
113. s to polygon features in order to convey descriptive characteristics of the link Links in Boundary Line may comprise up to several thousand line segments A chain is the closed loop of links bounding a polygon Nodes are the representation of the points at the start and end of a link At least one node occurs on the perimeter of a polygon where the bounding link completes the enclosure of the area There may be many nodes connecting the bounding links of a polygon Nodes are implicit in Boundary Line Polygons are continuous areas defined by sets of bounding closed lines They are representational of areas such as electoral wards and have relationships to administration collection features in order to convey descriptive characteristics of the polygon These are explicit within the data and can be viewed and manipulated with appropriate software Each link feature has associated geometry this will be two or more coordinate pairs Boundary Line data source Boundary Line is currently updated by mapping against OS Landplan 1 10 000 scale and in certain cases large scale sources Boundary Line features A list of the features within Boundary Line includes e Civil parish England and community Wales e County District e Electoral division county and unitary e European electoral region e Greater London Authority e Greater London Authority Assembly constituencies the London proportional representation voting areas e Lon
114. set Bournemouth and Poole Bournemouth Poole Dorset CC Christchurch East Dorset North Dorset Purbeck West Dorset Weymouth and Portland Somerset Mendip Sedgemoor South Somerset Taunton Deane West Somerset Cornwall and Isles of Scilly Cornwall and Isles of Scilly Cornwall Isles of Scilly Devon Plymouth Plymouth Torbay Torbay Devon CC East Devon Exeter Mid Devon North Devon South Hams Teignbridge Torridge West Devon Boundary Line user guide annexe D v1 18 09 2013 Crown copyright Page 37 of 94 NUTS 1 South East NUTS 2 Berkshire Buckinghamshire and Oxfordshire NUTS 3 Berkshire Milton Keynes Buckinghamshire CC Oxfordshire LAU 1 areas Bracknell Forest Reading Slough West Berkshire Windsor and Maidenhead Wokingham Milton Keynes Aylesbury Vale Chiltern South Bucks Wycombe Cherwell Oxford South Oxfordshire Vale of White Horse West Oxfordshire Surrey East and West Sussex Hampshire and Isle of Wight Brighton and Hove East Sussex CC Surrey West Sussex Portsmouth Southampton Hampshire CC Isle of Wight Medway Brighton and Hove Eastbourne Hastings Lewes Rother Wealden Elmbridge Epsom and Ewell Guildford Mole Valley Reigate and Banstead Runnymede Spelthorne Surrey Heath Tandridge Waverley Woking Adur Arun Chichester Crawley Horsham Mid Sussex Worthing Portsmouth Southampton Basin
115. sh Assembly The named Westminster constituency e The dataset for Wales has 68 named files made up of 22 authority files e 40 Westminster constituency files e 1European region file and e 5 Welsh Assembly electoral region files these include the Welsh parliamentary files e The dataset for Scotland has 100 named files made up of 32 authority files 59 Westminster constituency files e 1European region file and e 8 Scottish parliamentary electoral region files these include the Scottish parliamentary files As a consequence of the named file supply all coordinates in the supplied data file are full Ordnance Survey National Grid coordinates as there is no concept of local origin Complex polygons Complex polygons are polygons that wholly enclose other polygons They only occur when an administrative unit wholly encloses one or more others at the same level for example a rural district surrounding an urban district Figure 2 1 a complex polygon Cambridge District surrounded by South Cambridgeshire District EAST CAMBRIDGESHIRE DISTR HUNTINGDONSHIRE DISTRICT TRICT SOUTH CAMBRIDGESHIRE DISTRICT CAMBRIDGE DISTRICT Feature information Boundary Line has three feature classes e administrative units with attributes polygon features with attributes and e linear features links with attributes and geometry The position and shape of real world features are represente
116. t2013 ya NA Amend LB bay EAST LINDSEY LINCOLNSHIRE NORTH EAST 01 Oct 2013 N A N A Amend bdys at MLW LINCOLNSHIRE Amend Met Dist Const amp BIRMINGHAM 01 Oct 2013 N A N A Ward bdys Amend Met Dist Const amp COVENTRY 01 Oct 2013 N A N A Ward bdys Amend Met Dist Const amp DUDLEY 01 Oct 2013 N A N A Ward bdys Amend Met Dist Const amp SANDWELL 01 Oct 2013 N A N A Ward bdys Amend Met Dist Const amp SOLIHULL 01 Oct 2013 N A N A Ward bdys Amend Met Dist Const amp WALSALL 01 Oct 2013 N A N A Ward bdys Boundary Line user guide annexe v1 18 09 2013 Crown copyright Page 25 of 94 SI SI District Unitary Authority County London Borough u year number comments Metropolitan District if applicable WOLVERHAMPTON 01 Oct2013 N A Amend Mel Dist Const amp Ward bdys Amend Met Dist Const amp KNOWSLEY 01 Oct 2013 N A N A Ward bdys LIVERPOOL 01 Oct 2013 N A N A Amend Met Dist Cons Ward bdys Amend Met Dist Const amp ST HELENS 01 Oct 2013 N A N A Ward bdys WIRRAL 01 Oct 2013 N A N A Amend Met Dist Const amp Ward bdys Scotland SI year SI number Unitary Authority Operative date Comments if applicable CLACKMANNANSHIRE 01 Oct 2013 N A N A Amend MHW DUMFRIES AND GALLOWAY 01 Oct 2013 N A N A Amend MHW NORTH LANARKSHIRE SOUTH 01
117. the administrative unit for example 024431 NM distinctive name of administrative unit for example Hampshire County OP GSS code provided by the Office of National Statistics England and Wales and the General Register Office for Scotland for all units with exception of Greater London Authority county electoral divisions and non civil parish areas see chapter 3 Boundary Line explained for a full explanation TY the type of the non area for example VA meaning voting area AG code indicating the type of area for example CPC meaning civil parish or community NB selected areas have this code to indicate a non area is coincident with this area NA coastal areas carry the area of non land that constitutes this area Unique identifiers for administrative unit ADMIN AREA Each administrative unit carries unique identifier Al The same Al attribute is associated with every component polygon forming part of an administrative unit irrespective of the number of polygons The same Al attribute is also associated with every component administration forming part of an administrative unit even if the administration carries different name attributes NM for example MILTON CP and MILTON CP Det No 1 GLOBAL LINK ID LK Each link carries a unique identifier LK Boundary Line technical specification chapter 4 v1 18 09 2013 Crown copyright Page 62 of 94 GLOBAL POLYGON ID Each polygon carries a uniq
118. ther language please contact us on 44 0 8456 05 05 05 Use of the product The product is made available to you and your organisation on the terms of the OS OpenData Licence at www ordnancesurvey co uk opendata licence If there is any inconsistency between the terms of the licence and this guide the terms of the licence prevail Purpose and disclaimer This guide is provided for guidance only and does not constitute any warranty representation undertaking commitment or obligation express or implied about the product or its suitability for any particular purpose It is your responsibility to ensure that this product is suitable for your intended purpose Ordnance Survey does not accept any liability whether for breach of contract negligence or otherwise for any loss or liability you or any third party may suffer in relying on this guide and any guidance suggestion advice or explanation provided in it Ordnance Survey s liability to you in relation to the product is limited as set out in the OS OpenData Licence We may change the information in this guide at any time without notice We do not accept responsibility for the content of any third party websites referenced in or accessed through this guide or through the Ordnance Survey website Copyright in this guide This guide is Crown copyright 2013 You may copy or distribute any part of this guide to support the use of OS OpenData including for your personal use
119. uced significantly With this specification they will only be used to define non standard link features The mean high water tide lines will have the code 0071 The CD TY attributes together with the COLLECT list will take over from the polygon seed feature codes The boundary links will have implied codes through their roles in the various polygon CHAIN records HA HECTARES The area of the polygon quoted to a precision of 0 001 hectares but subject to the source data accuracies See Resolution LK GLOBAL LINK ID A unique identifier for each link Each LK attribute is unique to the entire Boundary Line dataset NA INLAND AREA The area of the administrative unit that is currently defined as non inland This will include foreshore and tidal water The value is quoted to a precision of 0 001 hectares NM NAME This attribute is conveyed in the Attribute record for collection of features and contains the distinctive name of the administrative unit for example LISS CP The name will always include the type of the area in the text string for example HAMPSHIRE COUNTY rather than HAMPSHIRE Exception to this rule include County Durham which is a unitary authority The addition of B at the end of the NAME is to identify the presence of boroughs without affecting the data structure NB TYPE CODE A code allocated by Ordnance Survey to indicate the non administrative or non voting area type that is defined by the correspo
120. ue identifier Relationships between record IDs Figure 5 1 relationships between record IDs LINEREC 23 GEOMETRY1 21 Link ATTREC 14 LINE ID Link ATT ID ATT ID GEOM ID GEOM ID ATT ID CPOLY 33 CHAIN 24 GEOM 1 GEOM ID CHAIN ID GEOM 10 CPOLY 10 i POLY ID S CHAIN ID POLY_ID ID COLLECT 34 ATTREC 14 ATTREC 14 Collection of Polygon and CPOLY_ID or POLY_ID Features CPolygon 10 ID 10 ID Additional relationships between record 105 The same ID number is used wherever there is a one to one relationship between different types of records Thus COLL ID ATT_ID for collection of features The COLL ID is found in the Collection of Features Record The 10 in the Attribute Record for collection of features CPOLY ID ATT 10 for complex polygon The CPOLY 10 is found in the Complex Polygon Record and the Collection of Features Record The ATT ID is found in the Attribute Record for CPOLY POLY 10 ID ATT for polygon The POLY is found in the Polygon Record and the Collection of Features Record The CHAIN 10 is found in the Polygon Record The 10 is found in the Attribute Record for polygon LINE ID GEOM ID ATT 10 for links The LINE ID is found in the Line Record The GEOM 10 is found in the Geometry Record and the Chain Record The
121. undary Line does not contain a separate mean low water springs MLWS only FC0071 representing the mean high water MHW NOTE to display the both MHW and another type of boundary for example European electoral region or Westminster constituency need to be displayed together Boundary Line user guide chapter 3 v1 18 09 2013 Crown copyright Page 20 of 94 The Territorial Waters Jurisdiction Act 1878 and the Territorial Waters Order in Council 1964 confirm that the extent of the realm of Great Britain as used by Ordnance Survey is properly shown to the limit of mean low water for the time being except where extended by Parliament This means that the extent of realm will be e mean low water mark mean low water springs in Scotland except when landward of a seaward extension or as shown below in Figure 3 5a and indicated as Point B e the mean high water mark mean high water springs in Scotland where coincident with mean low water or mean low water springs but not when landward of a seaward extension or Point B Point and e seaward extensions Figure 3 5a treatment of boundaries in estuaries Figure 3 5b treatment of estuaries in Boundary Line Normal Tidal Limit NTL Sea i Le 2 2 7 Won tidal river Key EOR MHW Boundary This figure shows how the features depicted in figure 3 5a are represented in Level of sea high water NTL
122. undary Line technical specification annexe v1 18 09 2013 Crown copyright Page 91 of 94 object real world A recognisable discrete part of the real world operative date The date the order was made not necessarily the day it becomes and in use origin The zero point in a system of rectangular coordinates physical record NTF A physical record may be a fixed length containing 80 characters or variable length containing up to 80 characters point and line data A form of vector data designed for map production in which all map features are designated as points lines or text Point and line data does not carry the topological relationships between features point feature A zero dimensional spatial abstraction of an object with its position defined by a coordinate pair Points are represented by nodes that may be isolated or part of a link terminating Points may also be represented by symbols that may have attributes such as rotation and size polygon Polygons are a representation of areas A polygon is defined as a closed line or perimeter completely enclosing a contiguous space and is made up of one or more links At least one node occurs on the perimeter of a polygon where the bounding link completes the enclosure of the area There may be many nodes connecting the bounding links of a polygon Links may be shared between polygons Polygons may wholly contain other polygons or be contained within other polygons
123. use in your organisation or business or for use with or incorporation in your product or application Boundary Line user guide preface v1 18 09 2013 Crown copyright Page 4 of 94 Data copyright and other intellectual property rights The Crown or where applicable Ordnance Survey s suppliers owns the intellectual property rights in the data contained in this product You are free to use the product on the terms of the OS OpenData Licence but must acknowledge the source of the data by including the following attribution statement Contains Ordnance Survey data Crown copyright and database right 2013 Trademarks Ordnance Survey the OS Symbol OS Landplan OS MasterMap and OSGB36 are registered trademarks and Boundary Line is a trademark of Ordnance Survey the national mapping agency of Great Britain Adobe and Reader are registered trademarks of Adobe Systems Incorporated ESRI is a registered trademark of Environmental Systems Research Institute Inc MapInfo is a registered trademark of MapInfo Corporation Backup provision of the product You are advised to copy the supplied data to a backup medium Using this guide The documentation is supplied in portable document format PDF only Free Adobe Reader software which displays the guide incorporates search and zoom facilities and allows you to navigate within Hyperlinks are used to navigate between associated parts of the guide and to relevant Internet resources by cli
124. use the data for your intended application Boundary Line benefits The high specification of Boundary Line offers you a number of benefits Full coverage of Great Britain supplied as England Scotland and Wales e The key boundary dataset for Great Britain suited to multiple applications using a GIS and other digital mapping systems e The full hierarchy of boundaries e Structured vector format offering great functionality e GSS codes where available allow you to link Boundary Line polygons with GSS information e Area values for every polygon e Mean high water springs mark enables you to build and explicitly identify dry land areas within coastal polygons e Documented annual updates allow you to easily identify relevant changes e Unique administrative area identifiers are retained at each update allowing revised boundaries to be related to your existing data Boundary Line applications Boundary Line provides a detailed and comprehensive dataset of coverage in Great Britain of administrative and voting boundaries that is designed to support a wide range of GIS and desktop mapping applications such as e political analysis e environmental analysis e statistical analysis for social or marketing decision making e geo demographic analysis e asset management e planning applications e legal work e reference and research and customised graphic output Boundary Line user guide chapter 1 v1 18 0
125. y Line is updated twice a year spring and autumn The updated product is a full replacement for all the listed administrative and electoral boundaries The represented boundaries and administrative unit names are defined and modified by Orders Acts and Statutory Instruments SIs Changes that are operative from the first week of May in the current year of release will be included Changes to Westminster constituencies that are effective from the date of the next general election will be included as separate files NOTE Orders Acts and Sls in exceptional circumstances due to processing or constitutional constraints may be excluded until the next suitable release Superseded boundaries Boundaries are no longer shown in Boundary Line if they have been superseded at the time of the annual snapshot of boundaries that each release of represents Government Statistical Service GSS codes Revisions to GSS codes are incorporated into Boundary Line as soon as practicable after the information is made available to Ordnance Survey Tide lines and rivers Additional coastline reconciliation with the OS Landplan product was introduced in May 2005 Changes to the Boundary Line tide lines plus natural and gradual changes to rivers and streams have been implemented alongside the previous boundary coast association to enhance the MHW FCO0071 All boundary alignment changes in Boundary Line will be reported in the change update d
126. year number Comments Metropolitan District ale if applicable HERTFORDSHIRE THREE RIVERS 01 Sep 2013 N A N A Parish Order NORFOLK BROADLAND 01 Jun 2013 N A N A Parish Order Boundary Line only represents the boundaries that are currently operational future dated or unsigned Sls will not be included This ensures that the boundary information currency is correct at the time of the dataset release Sls that are operational in May and or October but signed off too late for inclusion in the May or October products would be included in the next suitable release Boundary Line user guide annexe v1 18 09 2013 Crown copyright Page 28 of 94 Annexe B Boundaries that relate to Government Office Region Government Office Region County and unitary authority UA East of England Bedford Suffolk county Central Bedfordshire City of Peterborough Cambridgeshire county Luton Essex county Southend on Sea Hertfordshire county Thurrock East Midlands Norfolk county Derbyshire county City of Derby Leicestershire county City of Leicester Lincolnshire county City of Nottingham Northamptonshire county Rutland Nottinghamshire county London Kingston upon Thames London borough Enfield London borough Croydon London borough Waltham Forest London borough Bromley London borough Redbridge London borough Hounslow

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