OS OnDemand user guide
Contents
1. CS 06 generated from OS VectorMap District Strategi and Land Form PANORAMA OS OnDemand user guide chapter 3 v1 6 12 2012 Crown copyright Page 8 of 65 CS 07 generated from OS VectorMap District Strategi and Land Form PANORAMA CS08 generated from OS VectorMap District Strategi and Land F orm PANORAMA CS 09 generated from OS VectorMap Local DENM CS10 generated from OS VectorMap Local 1 2 lookups For more information on individual products please see the product web pages on the Ordnance Survey website htto www ordnancesurvey co uk oswebsite products index html Scale ratios Both OS OnDemand web services have built in preset scale ranges for each product and show them at a suggested optimal scale More information including extracts and suggested scale thresholds for each product can be found within the technical specification In the case of the WMTS like service the product selection is predefined into 10 zoom levels that are hard coded into the AP I itself OS OnDemand user guide chapter 3 v1 6 12 2012 Crown copyright Page 9 of 65 Chapter 4 Support The OS OnDemand service is available 24 7 with telephone support from 8 30 am to 5 30 pm Monday to Friday direct to the Ordnance Survey Customer Service Centre Availability and service parameters Service availability 99 9 99 9 Monitored by Information Systems site confidence Planned maintenance 8 00 pm 8 00 a2. An P M M OS OnDemand technical specification introduction v1 6 12 2012 Crown copyright Page 14 of 65 Chapter 1 Overview This document describes how to access the OS OnDemand web map service WMS provided by Ordnance Survey OS OnDemand also offers a web map tile service WMTS like The technical Specification for this service option is available in the OS OnDemand WMTS like page htto www ordnancesurvey co uk oswebsite support web services configuring os ondemand wmts htm The OS OnDemand WMS service is designed to allow clients to make Hypertext Transfer Protocol HTTP map requests with the content of the map being determined by a series of WMS parameters The relevant map image is composed by the WMS and streamed back to the client The service is Open Geospatial Consortium OGC WMS 1 1 1 and WMS 1 3 0 compliant and provides access to a range of Ordnance Survey data products The OS OnDemand service includes data for the whole of Great Britain and requests for maps can be made at any scale However only the appropriate data products for the scale of the map requested will be rendered on the output image The service uses digital rights management DRM to blue mask areas not licensed for viewing This document does not attempt to provide a detailed description of the WMS specification Instead it attempts to guide users in making appropriate requests to the service For furthe
3. v1 6 12 20122 o esc NU CECI D s d OS OnDemand technical specification contents v1 6 12 2012 Crown copyright Page 13 of 65 Introduction Purpose of this specification and disclaimer This is the technical specification hereafter referred to as the specification applicable to the OS OnDemand web map service WMS and web map tile like service WMTS like hereafter referred to as the product which is referred to in the Framework Direct Licence Specific Use Framework Partner Licence or your other customer contract for the product Copyright in this specification This specification including for the avoidance of doubt any mapping images reproduced herein is Crown copyright 2012 All rights reserved Any part of this specification may be copied for use internally in your organisation or business so that you can use OS OnDemand for the purpose for which it is licensed to your organisation or business but not otherwise No part of this specification may be reproduced or transmitted in any form or by any means including electronically for commercial exploitation without the prior written consent of Ordnance Survey No part of this specification may be copied or incorporated in products services or publications that you generate for onward sale or as free promotional or support materials without the prior written consent of Ordnance Survey 200 5 5 i p
4. OS OnDemand technical specification annexe B v1 6 12 2012 Crown copyright Page 62 of 65 o emm dJ c o JE a I Uu Dx c XS OS OnDemand technical specification annexe B v1 6 12 2012 Crown copyright Page 63 of 65 0000 wWweuEEEEMUUOCU E c J MMERCIUD OR Lc OIX COO EE OS OnDemand technical specification annexe B v1 6 12 2012 Crown copyright Page 64 of 65 Product scale ranges Annexe C Jo e7 Auebeuu depuaysey SO aINs Beg NX 2ydebope y depuaysewW SO S Beg Muiod 2iudeu6odo depuajsep SO BINS Beg SjoquuAS iudejboqie dej yejsew SO S eg Seur Aujepunog depuaysel SO 9 A S Beg X aur DIUdeuHodo depuajsey SO S Beg 9 Lezy oiudej6odo depusjse W SO ase y SHUM pue e g 9je s 000 OT T J9 Se Y 9JE2S 000 OTT M JA 3220S SO 000 OTT e207 dejA10129A SO Supe d JoAe1 gt Oome N YoOdsuels paeau depuajsep SO Speo 134e OMEN 110dsuei pa13ejl6ayu depusysep SO pPUsig dejuJ0o329A SO sanoquo q7140Y d uuo Jj pue1 NLA 31143OS d uuo 4 pue7 J9jse u Jn0J O 9 E2S 000 SZ T SINQJUOD VIV HONV d uuo 4 pue WLA VINVHONYV d uuo 4 pue JoSpezec o e s 000 OST J9jseu 4n0 O 9 E2 S 000 OS T Jajsey INOJOD 222S 000 OSZ T our Ajepunog 9Je siunw MSBIAJSAO gO M9IAISAQ J5 C 2 5 3 Oi ui Q c I Scale from e o o ci rc N 8 001 013 396 825 1 500 000 264 580 1 000 112 66 150 52 910 26 455 23 810 19 841 15 880
5. Suggested scale 1 metre per pixel Example request ors RES Ord nance Survey Head Office o EE OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 33 of 65 OS MasterMap Topography Layer OS OnDemand renders OS MasterMap Topography Layer into six separate image layers as described in the discussion of the LAYERS WMS parameter The OS MasterMap features are stylised similar to the OS MasterMap User guide htto www ordnancesurvey co uk docs user guides os mastermap topography layer user guide pdf There is also an optional backdrop style available using the product index names above Maps can be requested at any scale between 0 01 and 0 979 metres per pixel Maps at smaller scales will also be generated more quickly as less data is being rendered by the WMS server The map below has been generated at 0 25 metres per pixel which provides a clear rendering of text and symbols S uggested scale 0 25 metres per pixel Example request OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 34 of 65 Example request for optional backdrop style Enio iHa ues Ordnance Survey Head Office i E OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 35 of 65 OS MasterMap Integrated Transport Network Layer Suggested scale 0 25 metres per pixel Example request Output OS OnDemand technical specification chapter
6. 13 228 7 937 6 610 5 291 4 762 4 233 3 968 2 646 2 116 2 000 0 979 0 794 0 529 0 010 38 The scales ranges are calculated from the resolution metres per pixel values with an assumption of a 0 28mm pixel size 90 7 dpi rounded down OS OnDemand technical specification annexe C v1 6 12 2012 Crown copyright Page 65 of 65
7. Ordnance Survey product portfolio but are used to provide context at very small scales The Beta OS MasterMap Topography layers are an optional backdrop mapping style FORMAT This parameter specifies the format of the output image The possible values are image GIF image P NG and image PEG This parameter is mandatory BGCOLOR This parameter specifies the background colour in hexadecimal format This background colour will only be seen when a transparent layer is displayed This parameter is not mandatory TRANSPARENT This parameter specifies whether the map background is to be made transparent or not The valid values are or This parameter is most useful when vector data is being requested so the image can be overlaid on another background image by the client It should be noted that the J PEG format does not Support transparency and so the value of this parameter will be overridden by the service This parameter Is not mandatory ie a TT OS OnDemand technical specification chapter 1 v1 6 12 2012 Crown copyright Page 19 of 65 EXCEPTIONS This parameter specifies the format of any exceptions This parameter is not mandatory The GetFeaturelnfo WMS parameters A GetF eaturelnfo request will return an XML HTML or plain text document dependent on the format parameters An example of a GetFeaturelnfo WMS request to the service is shown below The output from this request is as follows The WMS GetFeaturelnfo request c
8. This parameter is mandatory For the OS OnDemand service features can be requested in plain text text plain HTML text html or GML 2 application vnd ogc gml PIXEL COLUMN X or I and PIXEL ROW Y or J These parameters define the pixel position of the feature to be returned In version 1 1 1 of the OGC WMS specification these were specified as parameters X and Y In version 1 3 0 these are now parameters and J These parameters are mandatory EXCEPTIONS This parameter specifies the format of any exceptions This parameter is not mandatory 0000 5 0 ese rc ae X HH T 4 e si OS OnDemand technical specification chapter 1 v1 6 12 2012 Crown copyright Page 21 of 65 Chapter2 Scale ratios for map products The display of individual layers in OS OnDemand is controlled by scale threshold settings This is to ensure that the appropriate map products are automatically displayed for the map scale requested The map scale is a function of the BBOX bounding box and WIDTH pixel width and HEIGHT pixel height WMS parameters The scale of the map requested can be represented in terms of metres per pixel as follows maximum easting minimum easting pixel width For example a WMS request might contain the following parameters The map scale in terms of metres per pixel is 450000 410000 400 2 100 metres per pixel Although a map can be requested at any scale ra
9. a computer readable form for example digitising maps EPSG A scientific organisation that compiled and disseminated the EPSG Geodetic Parameter Set a widely used database of Earth ellipsoids geodetic datums geographic and projected coordinate systems and units of measurement extended binary coded decimal Interchange code EBCDIC An 8 bit character encoding scheme For example 100111100 These can also be letters or specific characters for example feature A geographic entity such as a building or stream either taken from a map or surveyed directly from the real world Can be a point symbol text or line feature code A numerical feature code a five digit integer assigned to each feature with OS MasterMap Topography Layer This feature code is wholly determined by the feature type the descriptive group s and the descriptive term s feature type A high level grouping of features that are treated in a similar way for example TopographicP oint features format The specified arrangement of data for example the layout of a printed document the arrangement of the parts of a computer instruction or the arrangement of data in a record FTP File Transfer P rotocol A protocol that allows a user on one computer to transfer files to and from another computer over a TCP IP network such as the Internet OS OnDemand technical specification annexe A v1 6 12 2012 Crown copyright Page 47 of 65 generalised Generalisa
10. s data supply facilities This includes both direct sales customers of Ordnance Survey as well as customers of Licensed Partners It does not include anyone or any organisation that has access to Ordnance Survey material without charge data A representation of facts concepts or instructions in a formalised manner suitable for communication interpretation or processing database An organised integrated collection of geographic data which may or may not be spatial data It is stored so that specific applications can access the data by different logical paths A database is accessed and managed by a database management system software for managing database information 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 data quality Attributes of a dataset that define its suitability for a particular purpose such as completeness positional accuracy currency and so on dataset An identifiable set of data that share common characteristics and that are managed as a subset of the data within a database 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 definitive name The actual name of a feature as shown on the map delivery mechanism The method of supply of data to a customer for example offline and online descriptive group Attribute with d
11. uk oswebsite web services os ondemand compliant software html If a customer already has a GIS itis suggested that they contact their system supplier in the first instance to establish if a WMS client is available for their system In all cases customers should contact system suppliers first before subscribing to the OS OnDemand web map service If an organisation has no existing systems a list of software companies that provide systems that currently use Ordnance Survey products is available on the partner pages of the Ordnance Survey website and a list of compliant software can be obtained from http www opengeospatial org resource products bys pec More technical information on the OS OnDemand service can be found in the technical specification The WMS service is very straightforward in terms of what it can do a client sends a request for a map to the WMS and the WMS then generates and returns an image of the results of the request which is then displayed by the client The client however can be set up to provide more or less functionality The functionality of the client is determined by the client provider for example a software company and what the organisation wants its users to be able to do with the maps For example a client could be configured to request only certain maps subject to scale constraints and to display only certain maps at certain scales of view Different categories of user within an organisation could eve
12. 3 v1 6 12 2012 Crown copyright Page 36 of 65 OS MasterMap Integrated Transport Network Layer Urban Paths Suggested scale 0 25 metres per pixel Example request Output OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 37 of 65 OS MasterMap Imagery Layer Suggested scale 0 25 metres per pixel Example request Output ri im mec I DX uL A TEL PM T y FUDTAT PE pius j Lat OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 38 of 65 1 50 000 Scale Gazetteer Example request Output o assem cU C C Hc MC DEKA M eq ccce eeccrmcc c sec cases prrenl OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 39 of 65 OS Locator Example request Output REDBRIDGE LANE HILLY FIELDS ADANAC DRIVE DANEBURY WAY viwTR ELANE LAN E o FROGMORE LANE o eec ccc U pc RD Dc c Rc A CL nil OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 40 of 65 Land Form PANORAMA Contours Example request OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 41 of 65 Land Form PANORAMA DTM Example request Output OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 42 of 65 Land Form PROFILE Contours Example request Output OS OnDemand technical specification cha
13. Crown or where applicable Ordnance Survey s suppliers owns the intellectual property rights in Ordnance Survey digital map data Full details of the terms and conditions under which Ordnance Survey digital map data may be processed and or manipulated or copied by a customer whether or notfor use on PCs or workstations or for making hard copies are available from the Customer Service Centre please see contact details You should check the terms and conditions with us before using the data It is also the responsibility of the holder of the digital map data to ensure that any plotted or printed output contains the required copyright and database acknowledgements in a conspicuous position Trademarks Ordnance Survey the OS Symbol OS MasterMap MiniScale OS Street View Code P oint Land Form PANORAMA Land Form PROFILE OS VectorMap Strategi and OS Net are registered trademarks and Boundary Line Meridian OS Locator OS OpenData and Integrated Transport Network are trademarks of Ordnance Survey the national mapping agency of Great Britain OGC is a registered trademark of Open Geospatial Consortium Inc Adobe and Reader are registered trademarks of Adobe Systems Incorporated Back up provision of the product Y ou are advised to copy the supplied data to a back up medium Using this guide The documentation is supplied in portable document format PDF only Free Adobe Reader software which displays the guide incorporates s
14. NEC OS OnDemanq User guide and technical specifications OS OnDemand OS OnDemand user guide contents v1 6 12 2012 Crown copyright Page 2 of 65 Preface This user guide hereafter referred to as the guide is designed to provide an overview of the OS OnDemand web map service WMS and web map tile like service WMTS like 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 the guide please contact us at the address shown below under contact details or complete the product and service performance report form at annexe A 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 S016 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 9 ordnancesurvey co uk or visit the Ordnance Survey website at www ordnancesurvey co uk This document has been screened in accordance with the requirements set out in Ordnance Survey s If you have difficulty reading this information in its
15. OnDemand WMTS like service customers can use an Internet browser to access an HTML page containing an API key This will allow customers to place a map on a web page This is illustrated in Figure 1 and Figure 2 below x2 y2 Web Map Service WMS Bounding Box Server Figure 1 the supply of the OS OnDemand WMS service OS OnDemand user guide chapter 1 v1 6 12 2012 Crown copyright Page 5 of 65 Figure 2 the supply of the OS OnDemand WMTS like Web Map Tile Service WMTS like Bounding Box x1 y1 Applications Building an application around OS OnDemand can provide many benefits including instant access to the most up to date raster views of Ordnance Survey data location products can improve the quality of decision making where location is involved reduced reliance on IT infrastructure to support and serve geographic information the ability to extend the functionality of existing mapping systems or incorporate the service into existing Internet Intranet applications and provide a more cost effective solution than building and maintaining a stand alone service OS OnDemand user guide chapter 1 v1 6 12 2012 Crown copyright Page 6 of 65 Chapter2 System requirements OS OnDemand WMS Many GIS are able to actas a client for OS OnDemand a list of GIS vendors that are able to access OS OnDemand to OGC compliance standards can be found on the Ordnance Survey website htto www ordnancesurvey co
16. Read only memory CD ROM A data storage medium A 12 cm disc similar to the audio CD It is an alloy disc pitted with tiny holes and then coated in plastic A laser head reads the pattern of the holes and translates them into binary data complex feature A feature that is a collection of other features An example could be a feature representing a river composed of many area and line features representing parts of the river Complex features are not currently a part of OS MasterMap contract The agreement that a customer has for access to Ordnance Survey products and services coordinate pair A coordinate pair is an easting and a northing see rectangular coordinates coordinate reference system The term used in GML and hence in OS MasterMap specifications for the definition that allows each spatial position to be stated as a coordinate The only coordinate reference system currently used in OS MasterMap is the British National Grid coordinate transformation A computational process of converting an image or map from one coordinate system to another copyright The sole legal right to print or publish a work Crown Copyright subsists in all Ordnance Survey publications for a 50 year period from the end of the year in which they were first published by virtue of the OS OnDemand technical specification annexe A v1 6 12 2012 Crown copyright Page 45 of 65 customer An organisation or individual that makes use of Ordnance Survey
17. ample image width image length bits per sample photo interpretation and resolution TIFF TIFF is a tagged image file format based file format for storing and interchanging raster images with the most recent version 6 0 published in 1992 Uniform Resource Locator URL A uniform syntax constructed from a compact string of characters to identify resources on the Internet More commonly referred to as a web page address XML Extensible Markup Language A flexible way to create common information formats and share both the format and the data on the Internet Intranets and elsewhere XML is extensible because unlike HTML the markup tags are unlimited and self defining XML is a simpler and easier to use subset of the Standard Generalised Markup Language SGML the standard for how to create a document structure vector data Positional data in the form of coordinates of the ends of line segments points text positions and polygons and capable of attribution OS OnDemand technical specification annexe A v1 6 12 2012 Crown copyright Page 50 of 65 Annexe B OS OnDemand GetCapabilities XML document This section contains the XML document that is returned when requested There are two main sections to the document service and capability The service section contains general metadata about the service such as the title of the service and an abstract describing the service The capability section is divided into three main groups of infor
18. an be broken down into the following constituent elements Base URL The base URL identifies the WMS service to which requests are to be made Map specific parameters are appended to this URL to define the properties of the required map REQUEST For a GetFeaturelnfo request the REQUEST parameter should always be set to GetF eaturelnfo This parameter is mandatory VERSION This parameter specifies the version of the WMS request The OS OnDemand service is 1 1 1 and 1 3 0 compliant This parameter is not mandatory if it is not included the service will default to version 1 3 0 SERVICE If present this parameter should always be setto WMS however the parameter itself is not mandatory CRS Ri C O M H OS OnDemand technical specification chapter 1 v1 6 12 2012 Crown copyright Page 20 of 65 This parameter defines the coordinate reference system of the bounding coordinates in the BBOX parameter W e recommend that the value of this parameter should be EPSG 27700 which indicates the British National Grid However the service also supports EPSG 4258 which indicates the ETRS89 projection and EPSG 4326 which indicates the WGS84 projection However with both of these projections the BBOX coordinates must also be in the relevant projection This parameter is mandatory BBOX This parameter represents the bounding coordinates for the required request The order of the coord
19. current format and would like to find out how to access it in a different format Braille large print computer disk or in another language please contact us on 44 0 8456 05 05 05 Use of the product The terms and conditions upon which the product including this guide is made available to you and your organisation are contained in the customer contract made between you and Ordnance Survey If there is an inconsistency between the terms of your customer contract and this guide then the terms of your customer contract prevail If you or your organisation has not signed a valid current customer contract then you are not entitled to use the product 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 or intended purpose Any warranties representations undertakings commitments and obligations given by Ordnance Survey about the product and or its suitability for any particular or intended purpose are set out in your customer contract 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 p
20. earch 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 clicking 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 i a TE OS OnDemand user guide preface v1 6 12 2012 Crown copyright Page 4 of 65 Chapter 1 Introduction OS OnDemand is a national web map service WMS and web map tile service WMTS like for Great Britain that delivers raster data and rasterised vector data over the web directly into a customer s application as and when the customer requests the data from their computer This service is provided to customers as an addition to supply on CD and DVD The service is subscription based and requires the organisation subscribing to the service to have or be entitled through an agreement with Ordnance Survey to take coverage of the licensed products available through the service Web map services A web map service WMS is a service that runs over the Internet It offers subscribers the facility to send a request for a map from their computer to an external organisation that stores or hosts the maps The host receives the request via the Internet in the form of a standard web URL extracts the map requested and sends it back to the customer s computer as an image The customer views the
21. escriptive information about the feature descriptive name A name describing a real world object or feature for example School as shown on the 1 10 000 Scale Raster map descriptive text Descriptive text is defined within OS MasterMap Topography Layer as a generic name given to a feature where a distinctive name does not apply for example drain boundary post or car park Where the function or purpose of some features are not clear it is possible that they will be described with both a distinctive and descriptive name for example Sandy Lane Track or Old Thatched House PH descriptive term Attribute with descriptive information about the feature digital Data that is expressed as numbers digits in computer readable form Digital National Framework DNF A nationally consistent geographic referencing framework for Great Britain comprising the National Grid and the National Geographic Database that defines each geographic feature as it exists in the real world with a maintained unique reference allocated to each feature The DNF is not a product it is the framework on which our future products will be based OS OnDemand technical specification annexe A v1 6 12 2012 Crown copyright Page 46 of 65 digital update The supply of digital data to a customer at a predetermined interval of time if when the time interval has elapsed the map has reached an agreed level of change distinctive name A t
22. etry of a point feature is a single point a pair of coordinates with optional size and orientation polygon Polygons are representations of areas A polygon is defined as a closed line or perimeter that completely encloses a contiguous space and is made up of one or more lines positional accuracy The accuracy of the feature geometry relative to the coordinate reference system raster data Attribute data expressed as an array of pixels with spatial position implicit in the ordering of the pixels real world object The real world feature represented by a feature for example a building a fence a wood 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 a digitising table or a computer screen stipple Used to produce light or dark shading for example building water fill this is dependent on spacing of the dots the denser the dots the darker the effect OS OnDemand technical specification annexe A v1 6 12 2012 Crown copyright Page 49 of 65 string A set of items that can be arranged into a sequence according to a rule supply format The file format in which the data is supplied to the customer symbology The use of symbols tag Tags are unique numbers that are used for identifying specific information in TIFF files for ex
23. ext feature that form s a name that distinguishes it from other text features of the same type for example Millbrook S chool distinctive text Distinctive text is defined within OS MasterMap Topography Layer as a name given to a feature or place to distinguish it from other features or places of a similar nature for example River Avon Hill Lane Surgery Leeds or New Forest dots per inch dpi The resolution or fineness of a raster image eastings See rectangular coordinates ECW The Enhanced Compressed Wavelet ECW raster image compression software has been designed to compress display serve on the Internet and distribute raster The key characteristic of wavelet based compressions is that it is able to preserve a very good quality of the image with high compression ratios This compression format uses mathematical wavelet transformations to store image data rather than storing a grid of values for image pixels such as TIFF or other common formats This allows a great reduction in the amount of disk space it takes to store large images whilst retaining nearly all the original image s quality colour and detail ECW is a lossy format meaning that some information is lost when the image is converted from its original format to the ECW format However wavelet compression Is very good at retaining the character of images so the amount of loss is very small encoding The process of converting information to
24. icates the British National Grid However the service also supports EPSG 4258 which indicates the ETRS89 projection and EPSG 4326 which indicates the WGS84 projection However with both of these projections the BBOX coordinates must also be in the relevant projection This parameter is mandatory BBOX This parameter represents the bounding coordinates for the required map The order of the coordinates is minimum east minimum north maximum east maximum north If an invalid bounding box is supplied where for example the minimum easting is greater than the maximum easting an XML service exception will be returned If ETRS89 or WGS84 projections are used in the CRS parameter then the BBOX coordinates need to also be in these projections as decimal latitude and longitude This parameter is mandatory WIDTH and HEIGHT These parameters define the width and height of the returned map image in pixels This parameter is mandatory LAYERS The Layers parameter defines which map layers should be displayed on the map If more than one layer is specified each should be separated by a comma This parameter is mandatory For the OS OnDemand service map layers should be referenced by product index name as detailed below Product layer OS MasterMap Topography area raster format image MMAREA OS MasterMap Topography line raster format image MMLINE OS MasterMap Boundary Line raster format image MMBDY OS MasterMap Cartographic S y
25. ight Page 26 of 65 Meridian 2 Suggested scale 10 metres per pixel Example request Output M Sy C estwood A 5 N w t r M OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 27 of 65 1 25 000 Scale Colour Raster Suggested scale 5 metres per pixel Example request Output i A ss Ordnance Survey i Neia Head Office n Le OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 28 of 65 OS VectorMap District Suggested scale 5 metres per pixel Example request Output Nursling OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 29 of 65 OS Street View Suggested scale 1 metre per pixel Example request Output sent Ofiee Y Hillyfields 3 a gt gt E OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 30 of 65 1 10 000 Scale Raster Suggested scale 1 metre per pixel Example request Output OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 31 of 65 1 10 000 Scale Black and White Raster S uggested scale 1 metre per pixel Example request Output AS Hillyfields dd 28 d uU a cC JU g C y t XP Sng p e T 771 2 TIT LLL OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 32 of 65 OS VectorMap Local
26. inates Is minimum east minimum north maximum east maximum north If an invalid bounding box is supplied where for example the minimum easting is greater than the maximum easting an XML service exception will be returned If ETRS89 or WGS84 projections are used in the CRS parameter then the BBOX coordinates need to also be in these projections as decimal latitude and longitude This parameter is mandatory WIDTH and HEIGHT These parameters define the width and height of the returned map image in pixels This parameter is mandatory LAYERS The Layers parameter defines which layers should be requested If more than one layer is specified each should be separated by a comma This parameter is mandatory For the OS OnDemand service map layers should be referenced by product index name but the only map layer that will return a GetF eaturelnfo request is the OS MasterMap Imagery Layer which is referenced with IMA25 QUERY LAYERS The Query Layers parameter defines which layers from which features should be requested If more than one layer is specified each should be separated by a comma This parameter is mandatory For the OS OnDemand service map layers should be referenced by product index name but the only map layer that will return a GetF eaturelnfo request is the OS MasterMap Imagery Layer which is referenced with IMA25 INFO FORMAT The INFO FORMAT parameter defines the format that features should be returned in
27. ly expressed as a representative fraction for example 1 1 250 1 50 000 and so on OS OnDemand technical specification annexe A v1 6 12 2012 Crown copyright Page 48 of 65 megabyte Mb 1 048 576 bytes a measure of data storage capacity see gigabyte metadata Graphical or textual information about the content quality condition origins and characteristics of data National Grid A unique referencing system that can be applied to all Ordnance Survey maps of Great Britain at all scales It provides an unambiguous spatial reference for any place or entity in Great Britain northings See rectangular coordinates object based data Data in which one whole feature or a collection of whole features represents one real world object for example a building or land parcel origin The zero point in a system of rectangular coordinates OS Net The infrastructure of active and passive GPS reference stations that allow surveyors to determine precise coordinates in GPS and British National Grid coordinate reference systems OS Net provides the physical definition of the British National Grid the primary coordinate reference system used in OS MasterMap A central component of the Digital National Framework pixel A single point represented by a square PNG A bitmap image format and video codec that employs lossless data compression point A pair of coordinates point feature A feature representing a real world object The geom
28. m weekdays and 8 00 am 10 00 pm Thursdays weekends and Seven days notice is provided for planned manen E 8 00 am 2 00 pm Sundays Five days notice is provided for planned maintenance Key service metrics WMTS like Hosted infrastructure 99 9 24 7 365 days 99 9 24 7 365 days management Amazon cloud Amazon cloud Software and data 24 7 365 days 24 7 365 days throughput Application and data 24 7 365 days 24 7 365 days backup and disaster recovery excluding planned maintenance Transaction metrics are based on requests for 500 x 500 pixel data requests Access to help Ordnance Survey provides telephone support for queries on service availability subscription and technical information about the service itself from 8 30 am to 5 30 pm Monday to Friday through the Customer Service Centre Contact details can be found in the preface to this guide For assistance on setting up and using a client to access the service customers are urged to contact their system supplier and their IT security manager The IT security manager is likely to be responsible for and understand firewall and IT security protocols so is likely to able to offer advice on an optimal solution for accessing and onward managing of the OS OnDemand web service E OS OnDemand user guide chapter 4 v1 6 12 2012 Crown copyright Page 10 of 65 Annexe A Product and service performance report form Ordnance Survey welcome
29. map through systems or applications that have been enabled to run with a web map service These are referred to as web map service clients The specification for WMS is available from the Open Geospatial Consortium OGC http Wwww opengeospatial org which is an international standard The OS OnDemand WMS conforms to the OGC and Inspire specifications How the client is set up will dictate which instructions can be sent to the host The OS OnDemand WMTS is a like service in that itis similar to the web map tile service WMTS defined by OGC Currently the service can only be accessed using an application programming interface API not a geographical information system GIS which is a requirement of the OGC standard Access to OS OnDemand OS OnDemand customers must be licensed to use all the data they receive via the service The data can be used for any application that is allowed under the customers or partners existing product licence please contact Ordnance Survey for details of relevant licences Customers can connect to the OS OnDemand WMS service using a GIS or a web browser and receive data directly into their application There are a number of different types of system that can run a web map service and these include a web page viewed in an Internet browser a map viewing application or a GIS any application that can communicate via the web and can handle images can be made to work with a WMS To connect to the OS
30. mation Request Exception Layer OS OnDemand technical specification annexe B v1 6 12 2012 Crown copyright Page 51 of 65 i eg UU c c J MERCIUD OR Lc EIC OO cmd OS OnDemand technical specification annexe B v1 6 12 2012 Crown copyright Page 52 of 65 o emm d c co JM KC D Rc c ULL c cd OS OnDemand technical specification annexe B v1 6 12 2012 Crown copyright Page 53 of 65 0000 WMwmuEEEEMUUCU CE c J MMERCCIULD I Lc OIX E CE OS OnDemand technical specification annexe B v1 6 12 2012 Crown copyright Page 54 of 65 o emm d cc cJ RC D Rc cC WU Dx c cd OS OnDemand technical specification annexe B v1 6 12 2012 Crown copyright Page 55 of 65 aa i cU JEDE cc WU EL cec OS OnDemand technical specification annexe B v1 6 12 2012 Crown copyright Page 56 of 65 i eg a a a Lc CRETAE KK XE OS OnDemand technical specification annexe B v1 6 12 2012 Crown copyright Page 57 of 65 o emam d co JE RCD Rc c M WU D Sc d OS OnDemand technical specification annexe B v1 6 12 2012 Crown copyright Page 58 of 65 o esm d oc cR D cR c AUC Lx c c dd OS OnDemand technical specification annexe B v1 6 12 2012 Crown copyright Page 59 of 65 aa i a c cJ D Rc c WU Dx Scd OS OnDemand technical specification annexe B v1 6 12 2012 Crown copyright Page 60 of 65 i ee a e c a c Lc EIC ee eel OS OnDemand technical specification annexe B v1 6 12 2012 Crown copyright Page 61 of 65 0000 E
31. mbol raster format image MMSYM OS MasterMap Topographic Point S ymbol raster format image MMPT OS MasterMap Cartographic Text raster format image MMTXT Beta OS MasterMap Topography area raster format image 1 MMAREA2 Beta OS MasterMap Topography line raster format image MMLINE2 Beta OS MasterMap Boundary Line raster format image MMBDY2 Beta OS MasterMap Cartographic Symbol raster format image t MMSYM2 Beta OS MasterMap Topographic Point Symbol raster format image t MMPT2 Beta OS MasterMap Cartographic Text raster format image 1 MMTXT2 OS MasterMap Integrated Transport Network Layer raster format image MMITNR OS MasterMap Integrated Transport Network Layer Urban Paths theme raster formatimage MMITNP OS MasterMap Imagery Layer IMA25 OS OnDemand technical specification chapter 1 v1 6 12 2012 Crown copyright Page 18 of 65 OS VectorMap Local 1 10 000 Scale Black and White Raster 10KBW 1 10 000 Scale Raster 10KC 1 25 000 Scale Colour Raster 25K 1 50 000 Scale Colour Raster 50K Land Form PROFILE Contours PROCONT Land Form PROFILE DTM PRODTM GB Overview OV1 GB Overview OVO OS OpenData products OS VectorMap District VMD 1 50 000 Scale Gazetteer GAZ 1 250 000 Scale Colour Raster 250K Boundary Line BL Land Form PANORAMA Contours PANCONT Land Form PANORAMA DTM PANDTM Meridian 2 M2 MiniS cale MS OS Locator LOC OS Street View 1 10 000 scale S GB Overview and GB Overview do not form part of the
32. n have clients tailored specifically to their needs for geographic information P rior to establishing a client an organisation may like to consider the different way in which the geographic information available through OS OnDemand may be used and also what access if any to other sources of geographic information needs to be used within the client Once the client is enabled on a customer s computer access to the service will be controlled by the terms of the contract with Ordnance Survey and the organisation s IT infrastructure including any firewall and security protocols which should be identified and tested to ensure an optimal service experience Chapter 4 explains in detail what data products are provided through this service OS OnDemand WMTS like The WMTS like service is currently only available via the API The API is a J avaScript library that is accessed via an HTML page In order to be able to view the HTML page you require a web browser capable of supporting J avaScript For further details please refer to the OS OnDemand WMTS like page htto www ordnancesurvey co uk oswebsite support web services configuring os ondemand wmts htm ie ux e UU a a ET OS OnDemand user guide chapter 2 v1 6 12 2012 Crown copyright Page 7 of 65 Chapter 3 Products The service contains Great Britain coverage for separate raster products Where the product is derived from a vector product for example OS MasterMap Topography Layer i
33. nd the location URL and type for the request For example the following section from the GetCapabilities document describes the GetMap request In this fragment there are three elements named Format the content of these elements tell the requesting client what formats are available to request In this case there is the choice of either PEG GIF or PNG The DCPType element describes to the client how it can make a GetMap request In this case the client will know that it must perform a HTTP GET requestto the xlink href attribute of the OnlineR esource element 0 aeem m i c CC CM c M P pn c l OS OnDemand technical specification chapter 1 v1 6 12 2012 Crown copyright Page 15 of 65 The exception section describes the formats it will return service errors in A service exception will typically occur when an incorrect request is made for example when insufficient parameters are included in the GetMap request This is an exception returned as a result of an incorrectly formed GetMap request This exception tells us that the request was missing the LAYERS parameter The final section of a GetCapabilities document is Layer this is the section that describes the core capabilities of the OS OnDemand service The Layer section contains the following key elements CRS a list of the Coordinate Reference Systems supported by the service LatLonBoundingBox the bou
34. nding box for the service described in latitude and longitude BoundingBox the bounding box for the service described in British National Grid eastings and northings and Layer a list of layer elements one for each layer available in the service The list of layer elements describes all of the layers Ordnance Survey products available in the service The attributes of each layer element provide further information about the layer queryable a Boolean value indicating if a GetFeaturelnfo request can be made for this layer Name a string value that provides the identifier for this layer in a GetMap request Title a string value that provides the name for this layer to be used in a GUI For OS OnDemand this is the name of the product delivered in this layer CRS the default coordinate reference system for this layer expressed as an EPSG identifier http www epsg org LatLonBoundingBox the extents for this layer expressed as the minx miny maxx and maxy coordinates A more complete discussion of the GetCapabilities document returned by a WMS can be found on the OGC website OS OnDemand technical specification chapter 1 v1 6 12 2012 Crown copyright Page 16 of 65 The GetMap WMS parameters A GetMap request will return a map image An example of a GetMap WMS requestto the service is shown below The map output from this request is as follows The display of individual map layers is also controlled by scale th
35. pter 3 v1 6 12 2012 Crown copyright Page 43 of 65 Land Form PROFILE DTM Example request Output OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 44 of 65 Annexe A Glossary The purpose of this chapter is to provide a glossary of terms used in the definition of products services licensing and other terms and conditions for Ordnance Survey products W here terms refer to other terms within the glossary they are connected by means of hyperlink to the relevant entries American Standard Code for Information Interchange ASCII A standard binary coding system used to represent characters within a computer attribute Any item of information packaged in a vector feature attribute set A group of attributes that can legitimately and logically be used together Each feature type uses a particular attribute set binary digit BIT The smallest possible unit of data resulting from a choice between 0 and 1 boundary A boundary forms the division between two similar real world objects for example property boundary or administrative boundary and is defined by one or more lines byte A unit of computer storage of binary data usually comprising 8 bits equivalentto a character character A distinctive mark an inscribed letter one of a set of writing symbols character code The binary representation of a single element of a character set for example EBCDIC ASCII compact disc
36. r information on the WMS 1 1 1 and WMS 1 3 0 specification please refer to http www opengeospatial org docs 01 068r3 pdf As an OGC WMS 1 1 1 and WMS 1 3 0 compliant service there are two main types of request that a WMS client can make to OS OnDemand GetCapabilities these requests will return a document to the client software that will describe the capability of the service and GetMap these requests will return a map image according to the parameters specified by the client For OS MasterMap Imagery Layer only we also support the G etF eaturelnfo request which returns the metadata date flown and so on for this layer GetCapabilities A GetCapabilities request will return an XML document that describes to the client making the request what features are supported by the OS OnDemand service A capabilities document can be retrieved using the following URL http osondemand ordnancesurvey co uk ondemand wms REQUEST G etC apabilities Annexe B contains the XML document that the above request returns There are two main sections to the document service and capability The service section contains general metadata about the service such as the title of the service and an abstract describing the service The capability section is divided into three main groups of information request exception and layer The request section contains details of the WMS requests supported by the service along with details of the response format a
37. resholds that are automatically applied In the sample request above even though multiple layer indexes were specified in the Layers parameter only 1 50 000 Scale Colour Raster data was displayed in the resultant map This is because most data layers are only appropriate for a particular scale range See chapter 2 for a more detailed description of this topic The WMS request can be broken down into the following constituent elements Base URL The base URL identifies the WMS service to which requests are to be made Map specific parameters are appended to this URL to define the properties of the required map REQUEST For a map image request the REQUEST parameter should always be set to GetMap This parameter is mandatory VERSION This parameter specifies the version of the WMS request The OS OnDemand service is 1 1 1 and 1 3 0 compliant This parameter is not mandatory if itis not included the service will default to version 1 3 0 2000 51 o o eemm m A Md q u OS OnDemand technical specification chapter 1 v1 6 12 2012 Crown copyright Page 17 of 65 SERVICE If present this parameter should always be setto WMS however the parameter itself is not mandatory CRS This parameter defines the coordinate reference system of the bounding coordinates in the BBOX parameter W e recommend that the value of this parameter should be EPSG 27700 which ind
38. rovided in it Any liability that Ordnance Survey has to you in relation to the product its supply use accuracy data supplied functionality or any other liability arising out of or in connection with the product is limited as set out in your customer contract 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 or accessed in or through this guide any contractual documentation and or the Ordnance Survey website E OS OnDemand user guide preface v1 6 12 2012 Crown copyright Page 3 of 65 Copyright in this guide This guide including for the avoidance of doubt any mapping images reproduced herein is Crown copyright 2012 All rights reserved Any part of this guide may be copied for use internally in your organisation or business so that you can use the product for the purpose for which it is licensed to your organisation or business but not otherwise No part of this guide may be reproduced or transmitted in any form or by any means including electronically for commercial exploitation without the prior written consent of Ordnance Survey No part of this guide may be copied or incorporated in products services or publications that you generate for onward sale or as free promotional or support materials without the prior written consent of Ordnance Survey Data copyright and other intellectual property rights The
39. s feedback from its customers about OS OnDemand If you would like to share your thoughts with us please print a copy of this form and when completed post or fax itto the address below OUNMO c Side iste RE TRE POS aa a a E A PAO o E nda afoncid get Detach chert utaas ede ealosn atateataatensiness ya baad aadapint saandedlesiacscatbaeeestiend Quotation or order referenCe e cececcecceccececcucceccuceeceecucaueaeeeeeueaeeaeseeaeeaueeeseeaueneseeseeaceaenensaeseeaeeaeseeaeeaeeeserauraesennnnanss Please record your comments or feedback in the space below W e 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 OS OnDemand Product Manager Ordnance Survey Adanac Drive SOUTHAMPTON SO16 0AS If you wish to return it by fax please dial 44 0 23 8005 6159 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 0000 e RPn OS OnDemand user guide annexe A v1 6 12 2012 Crown copyright Page 11 of 65 OS OnDemand OS OnDemand technical specification contents v1 6 12 2012 Crown copyright Page 12 of 65 Annexe C PYOGUGL SCA TAN ll Mee 65
40. ster map products will demonstrate optimal quality at particular scales The table at annexe C shows the suggested map scale for each product as well as the scales at which the products are available Maps can be requested at intermediate scales but the resulting image might show slight pixilation OS OnDemand technical specification chapter 2 v1 6 12 2012 Crown copyright Page 22 of 65 Chapter 3 Data layer details This chapter gives examples of the GetMap commands for each product in the OS OnDemand service starting with the smallest scale data MiniScale MiniScale Suggested scale 100 metres per pixel Example request North Wessex n yy Alresford ieee 22 OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 23 of 65 1 250 000 Scale Colour Raster Suggested scale 25 metres per pixel Example request Output Ower services J ORO CY Uu alat OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 24 of 65 Strategi Suggested scale 25 metres per pixel Example request OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyright Page 25 of 65 1 50 000 Scale Colour Raster Suggested scale 10 metres per pixel Example request Output ILE m E E e Ez gt eek 2 E j 4 of OR Braadla nds ake OS OnDemand technical specification chapter 3 v1 6 12 2012 Crown copyr
41. t is served as raster image based on a predesigned Style Layer Descriptor SLD WMTS like OS MasterMap Topography Layer raster format image L1 Beta OS MasterMap Topography Layer raster format image EMEN OS MasterMap Integrated Transport Network Layer Road Network theme raster format image OS MasterMap Integrated Transport Network Layer Road Routing Information theme raster format image OS MasterMap Integrated Transport Network Layer Urban Paths theme raster format image 05 mastermap imagery Layer SVetwMap loa T10 000 Scale Black and White Raser T10 o00 Scale Raster OO 125000 Scale ColourRaser OO x50000 Scale Colourraste Tend Forn PROFILE conous Land Form PROFILE digtalterrain model DM o UCsBOwwewk 0000000000 UGBOwwew Os Opendata pos OSVetwMapbewkt 150000 Scale Gazete 1250000 Scale Colourraser S emmyie OOOO f lawfomPANORAMA Conus laMfomPANORAMADIM Wedayi O Cms OOO osteo me O Ossveew Gao 000s Ces Oopn HowWapsuk esoo generated fom Sragi CS l genetedfomStstegiandlan fom PANORAMA csa2 generated from StrategiandLand FormPANORAMA C503 generated from StrategiandLand FormPANORAMA CS04 generated from StrategiandLand FormPANORAMA CS05 genetedfomStstegiandLan fomPANORAMA
42. tion is the task of deriving maps or geographic information products at a smaller scale starting with more detailed existing mapping or source data It involves exaggerating those aspects that are important for a particular purpose and scale and removing irrelevant detail that would clutter the product and confuse the user GIF A bitmap image format that was introduced in 1987 The format supports up to 8 bits per pixel thus allowing a single image to reference a palette of up to 256 distinct colours gigabyte Gb 1 073 741 824 bytes a measure of data storage capacity see megabyte GML Geography Markup Language An XML encoding for the transport and storage of geographic information including both the geometry and attributes of geographic features GPS Global Positioning S ystem A satellite based navigation system allowing the determination of any point on the Earth s surface with a high degree of accuracy given a suitable GPS receiver identifier An identifier that is primarily intended to provide unique and unambiguous feature identification for the purposes of exchanging feature based information between computer systems or associating data within a computer system indefinite detail Indefinite detail is defined as those physical features that are significantly important and have an outline that is either liable to change or not defined precisely by any surveyable feature for example vegetation limits or man made slopes The na
43. ture of vegetation is shown except for trees and scrub bushes brambles and undergrowth growing in permanent water Indefinite detail is not surveyed precisely The accuracy of survey is related to the degree of definition on the ground inferred links Line features representing inferences about the real world rather than topographic statements of fact These sensibly subdivide certain types of polygon feature where there is no appropriate topographic detail They are normally used to divide road sections separate individual garden plots in residential areas where no dividing fence hedge or wall exists close junctions between roads and car parks or hard standing areas and close fields that have simple breaks in the hedge or wall rather than gates JPEG An image named after the J oint Photographic Experts Group it uses a lossy compression format It is designed for compressing a full colour or greyscale images of natural real world scenes and works well on photographs It is the de facto standard for photographs on the web kilobyte Kb 1 024 bytes a measure of data storage capacity Licensed Partner Any organisation that has entered into a formal licence agreement with Ordnance Survey to market map information or to incorporate map data with their application or service line The straight line segment between two given points map scale The ratio between the extent of a feature on the map and its extent on the ground normal
Download Pdf Manuals
Related Search