The Sircci Network File User Guide lîKCENSEMErSI DE 1991
Contents
1. 1 AREA 9 PERIMETER 17 COVER 21 COVER ID 25 POINT ID 33 CLASS 36 ADDRESS 41 NAME 1 WDTH OPUT TYP N DEC ALTERNATE NAME 18 18 KE DO I eco CLASSE ADDRESSE NOM NOTE A description of this table can be found on the following page Page 23 Statistics Canada Street Network File User Guide Item Description Point Attribute Table 1 Area Set to zero 2 Perimeter Set to zero 3 COVER Maintained by ARC INFO 4 COVER ID Maintained by ARC INFO 5 POINT ID Identifier for point feature 6 Class A three character code which identifies the different types of features see LIST A 7 Address The civic number of the feature 8 Name twenty character item containing the given name of the feature NOTE NOT ALL CMAs CAs HAVE POINT FEATURES Statistics Canada Page 24 Street Network File User Guide DATAFILE NAME COVER CEN 4 ITEMS STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N DEC ALTERNATE NAME 1 REPR POINT ID 4 8 B 0 5 UTM ZONE 2 2 I 7 UTM X 6 61 13 UTM Y 7 7 I REDEFINED ITEMS 1 CEN LEFT 4 8 B 0 CEN G 1 CEN RGHT 4 8 B 0 CEN D NOTE A description of this table can be found on the following page gt Statistics Canada Page 25 Street Network File User Guide Item Description Representative Point File Representative Point ID A unique representative point identifier UTM Zone The2. Addresses are identified on the right and left hand side of addressable features at from and to nodes defining the arc The address is either a civic number or one of the following codes 0 indicates non addressable feature e g a river 41 indicates that the address is unknown this is the case when street network information has been updated but address ranges have not 2 indicates an unknown address opposite a T intersection 3 indicates that on a municipal boundary addresses are unknown on one side of the boundary that is for addressable features which follow a CSD limit the addresses are found only on the one side of the feature that is contained within the CSD Feature Name The Feature Name field is alphanumeric where the first character must be either A to Z or 0 to 9 The remaining characters may contain a combination ranging from A to Z or blank characters The name used for this field is the official name supplied by local expertise The following is a description of regulations pertaining to feature name coding When the name exceeds the maximum field size of 20 characters it is truncated at the end If the end result is meaningless an abbreviation of the name may be used instead Feature names containing prefixes such as Des de le la les 1 d de 1 du de la The are coded at the end of their names with a comma and a blank separating them from the name ex De l cole wi
3. 89 May 89 June 86 June 86 June 86 May 89 June 86 June 86 Aug 89 June 86 June 86 June 86 June 86 Sept 89 Nov 88 Statistics Canada Street Network File User Guide Lemoyne Lery Longueuil Lorraine Maple Grove Mascouche Mirabel Mont Royal Outremont Mont Saint Hilaire Montr al Westmount Montr al Est Montr al Nord Montr al Ouest C te Saint Luc Hampstead Saint Pierre Otterbum Park Pierrefonds Roxboro Saint Genevi ve Pincourt Pointe Claire Dollard des Ormeaux Repentigny Richelieu Rosem re Saint Amable Saint Basile le Grand Saint Bruno de Montarville Saint Eustache Saint Hubert Saint Lambert Saint Laurent Saint Mathieu de Beloeil Saint Raphael de L le Bizard Saint Julie Sainte Marthe sur le Lac Sainte Th r se Senneville Baie D Urfe Sainte Anne de Bellevue Terrasse Vaudreuil Varennes L fle Cadieux Vaudreuil Vaudreuil sur le Lac Page 9 5 lt lt lt 6 lt lt 5 lt lt lt 944 lt lt lt 4 lt 44444 lt 44444440444444444444444 June 91 Jan 91 May 91 June 89 May 91 May 91 May 91 June 89 June 89 June 89 May 91 May 91 Jan 88 Apr 91 Apr 91 Nov 87 May 89 Mar 89 July 88 May 89 June 89 June 86 June 86 June 86 June 86 June 86 June 86 June 86 June 86 June 86 June 86 June 86 June 86 Nov 88 June 86 June 86 June 86 June 86 June 86 June 86 June 86 June 86 June 86 Jan 89 June 86 June 86 Junc 89 June 86 June 89 June 86 Mar
4. Landing facility for aircraft usually with more than one runway with facilities for handling passengers and air freight and for servicing aircraft Approach to Highway refer to Ramp Aqueduct A water conduit namely one for supplying water to a community from a distance Block face The general concept of a block face is one of a small recognizable geographical unit to which census data can be i 7 goal is to approximate through aggregation user defined query areas for census data extraction The block face refers to one side of a city street normally between consecutive intersections with streets or other physical features such as creeks or railways Boundary A line indicating the limit o extent of an area or territory Bridge A structure erected over a water body which is defined using shorelines instead of streamlines Canal 1 An artificial waterway constructed to facilitate movement of ships and barges 2 A watercourse built to convey water for irrigation For the full definitions and additional remarks related to this term users should refer to the 1991 Census Dictionary Cat No 92 301E gp UM oc nn n Statistics Canada Page 35 Street Network File User Guide Census Agglomeration The general concept of a census agglomeration is one of a large urban area togetber with adjacent urban and rural areas which have a high degree of economic and social integration with that urban area
5. 5 5 4 8 4 8 N DEC B 0 B 0 B 0 B 0 F 5 B 0 B 0 I z I I _ C 2 z C I I I I B 0 B 0 1 ALTERNATE NAME POLY_G_ID POLY_D_ID CLASSE NOM ADR_DEB_G ADR_FIN_G ADR_DEB_D ADR_FIN_D CEN_G CEN_D NOTE A description of this table can be found on the following page gt gt gt Page 19 Statistics Canada Street Network File User Guide Item Description 16 Arc Attribute Table 1 FNODE From node maintained by ARC INFO 2 TNODE To node maintained by ARC INFO 3 LPOLY Left polygon maintained by ARC INFO 4 RPOLY Right polygon maintained by ARC INFO 5 Length of arc maintained by ARC INFO 6 COVERS maintained by ARC INFO 7 COVER ID maintained by ARC INFO 8 ARC ID Unique Arc Identifier 9 LPOLY 10 Identifer for polygon on left side of the arc 10 RPOLY ID Identifer for polygon on right side of the arc Class A three character code which identifies the different types of features see LIST 12 Name A twenty character item containing the given name of the feature 13 Type A two character item used for street identification when the street is a single or multiple lane addressable street see LIST B 14 Direction A two character code identifying the direction of the feature see LIST C 15 ADDR FM LEFT The civic address found on the left hand side of the arc at the FROM node ADDR TO LEFT The civic address found on the le
6. 89 June 86 Nov 88 June 86 Jan 89 June 86 June 86 June 86 June 86 June 86 June 86 June 86 June 86 Statistics Canada Street Network File User Guide OTTAWA HULL CMA Quebec Part Aylmer Buckingham Chelsea Gatineau Cantley Hull La P che Masson Pontiac Val des Monts QUEBEC CMA Beauport Bemi res Cap rouge Charlesbourg Charny L Ancienne Loretie Loretteville Wendake Notre Dame des Anges Qu bec Saint tienne de Lauzon Saint Jean Chrysostome Saint Lambert de Lauzon Saint Nicolas Saint R dempteur Saint Romuald Sainte Foy Sainte H l ne de Breakeyville Sillery e Vanier SHERBROOKE CMA Sherbrooke TROIS RIVI RES CMA Cap de la Madelein Trois Rivi res Trois Rivi res Ouest SAINT J ROME CA Saint J rome Page 10 v v CT V SD V SD SVS VSS eee Ses lt lt lt Aug 90 Aug 89 Aug 89 Sept 91 Dec 88 Sept 89 Mar 88 May 91 Mar 88 Mar 88 May 91 Jan 90 May 91 May 91 Jan 90 May 91 May 91 May 91 May 91 May 91 May 91 June 91 Jan 91 May 91 May 91 May 91 May 91 May 91 Sept 90 June 91 June 91 June 91 Sept 90 Aug 90 Aug 89 Aug 89 Feb 91 June 86 Sept 89 June 86 Mar 88 Mar 88 Mar 88 Feb 87 June 86 June 86 July 88 Dec 88 June 86 Junc 86 June 86 June 86 June 86 June 86 June 86 June 86 June 86 June 86 June 86 June 86 Junc 86 June 86 June 36 June 86 July 88 June 86 June 86 June 86 Statistic
7. A CA is delineated around an urban area called the urbanized core and having a population of at least 10 000 based on the previous census Once a CA attains an urbanized core population of at least 100 000 based on the previous census it becomes a census metropolitan area Census Metropolitan Area CMA The general concept of a census metropolitan area CMA is one of a very large urban area together with adjacent urban and rural areas which have a high degree of economic and social integration with that urban area A CMA is delineated around an urban area called the urbanized core and having a population of at least 100 000 based on the previous census Once an area becomes a CMA it is retained in the program even if its population subsequently declines Census Subdivision CSD Refers to the general term applying to municipalities as determined by provincial legislation or their equivalent e g indian reserves indian settlements and unorganized territories In Newfoundland Nova Scotia and British Columbia the term also describes geographic areas that have been created by Statistics Canada in co operation with the provinces as equivalents for municipalities Cliff A high and extremely steep rock face approaching the vertical Control Point A point location usually an intersection of 2 features with identifiable or known UTM coordinate values used in the AMF creation process digitizing Creek A sm
8. CMA Lumsden T June 86 June 86 Regina C June 86 June 86 Sherwood No 159 RM June 86 June 86 Grand Coulee VL Jan 91 June 86 SASKATOON CMA Saskatoon 91 lunc 86 ALBERTA CALGARY CMA Calgary Feb 91 July 88 EDMONTON CMA Edmonton C Oct 91 May 89 LETHBRIDGE CA Lethbridge 91 June 86 RED DEER CA Red Deer C Jan 91 June 86 __ Statistics Canada Page 15 Street Network File User Guide BRITISH COLUMBIA KAMLOOPS CA Kamloops Cc Mar 89 June 86 Kamloops 1 R June 86 June 86 KELOWNA CA Duck Lake 7 R Feb 90 Dec 88 Kelowna C Feb 90 Dec 88 Cen Oka Sub SRD June 86 June 36 Peachland DM June 86 June 86 Tsinstikeptum 9 R June 86 June 86 Tsinstikeptum 10 R June 86 June 86 MATSQUI CA Matsqui DM May 89 89 PRINCE GEORGE CA Prince George C Oct 88 Feb 88 VANCOUVER CMA Burnaby DM June 91 June 86 Coquitlam DM Apr 91 June 86 Coquitlam 1 R Apr 91 June 86 Delta DM Jan 90 June 89 Tsawassen R Jan 90 June 89 Musqueam 4 R Jan 90 June 89 Anmore VL June 86 June 86 Barnston Island 3 R June 86 June 86 Belcarra VL June 86 June 86 Greater Vancouver Subd A SDR June 86 June 86 Lions Bay VL June 86 June 86 Katzie 2 R June 86 June 86 Langley C June 86 June 86 Langley DM DM Aug 91 June 86 Matsqui 4 R June 86 June 86 McMillan Island 6 R June 86 June 86 Katzie 1 R J
9. Network Files are being made available in two formats the AMF format and the ARC INFO Sen format There are a few differences between the two versions The ARC INFO Export versions of the Street Network Files have been edgematched whereas the AMF versions have not however all gaps of 20 meters or more in the AMF version have been identified and corrected During the loading of the AMF versions into ARC INFO to create the ARC INFO versions some features were found to be coincident i e they were defined by the same arc An example would be a municipal limit that followed a river Where this occurred only one of the features was retained Preference was given to addressable features and physical features i Statistics Canada Page 6 Street Network File User Guide 3 REFERENCE DATES OF THE SNF 7 The following list provides the reference dates of the street network as well as address information on census subdivisions CSDs found within census metropolitan areas CMAs The reference dates that appear in the two columns below are based on the information at our disposal at the time of the last SNF update The first column pertains to the reference dates of the street network while the second column refers to the address information CSD Name CSD Type Reference Date NEWFOUNDLAND ST JOHN S CMA St John s Dec 89 Dec 89 Wedgewood
10. Park T Dec 89 Dec 89 NOVA SCOTIA HALIFAX DARTMOUTH CMA Bedford T Jan 90 June 87 Dartmouth C June 91 Aug 89 Halifax Nov 91 June 86 NEW BRUNSWICK MONCTON CA Coverdale PCA June 86 June 86 Dieppe T Jan 91 June 86 Dorchester PCA June 86 June 86 Dorchester VL June 86 June 86 Fort Folly 1 R June 86 June 86 Saint Joseph VL June 86 June 86 Hillsborough PCA June 86 June 86 Hillsborough VL June 90 June 86 Moncton c Jan 91 June 86 Moncton PCA June 86 June 86 Salisbury VL June 90 June 86 Riverview T Jan 91 June 86 A Statistics Canada Page 7 Street Network File User Guide SAINT JOHN CMA Saint Jobn C FREDERICTON CA Devon 30 R Fredericton C St Mary s 24 R IUEBEC CHICOUTIMI JONQUIERE CMA Chicoutimi Jonqui re La Baie lt lt lt MONTREAL CMA Anjou Saint L onard Beauharnois Beloeil Blainville Boisbriand Bois des Filion Boucherville Brossard y 5 8 LADA lt lt Page 8 Dec 90 June 86 Jan 91 June 86 Apr 91 Apr 91 Mar 89 June 89 June 89 Junc 86 Jan 91 Apr 91 Mar 89 May 91 June 91 May 91 May 91 Apr 91 May 91 May 91 May 91 May 89 June 89 June 89 June 89 May 91 Jan 90 Jan 90 Mar 91 June 91 Mar 91 June 89 June 89 May 91 May 91 June 86 June 86 June 86 June 86 June 86 Apr 88 Mar 89 June 86 June 86 June 86 June 86 June 86 Oct 88 June 86 June 89 June 89 Apr 89 June 86 June 86 June 86 June 86 Aug
11. Result of Integration 2 5 Completness Non Street Features 2 6 Limitations on Use ht rnn 2 7 Two Formats What are the Differences 3 REFERENCE DATES OF THE SNF 4 TECHNICAL SPECIFICATIONS Rider 4 1 Physical Media Description 42 How to Use the SNF 4 3 Info Tables Ee e a e rhone Rohr msi TN dede die ERI List A Feature Classification List B Street Type List WDR AA ES S X Te TI List C Feature Direction 22 cece cece eee hh ems 4 4 Data Item Regulations And Clarifications 5 SNF DICTIONARY rH hh ntn n 6 SUPPLEMENTARY INFORMATION 4 6 1 For Further Information 6 2 Additional References and Services ARC INFO is a registered trademark of the Environmental Systems Research Institute Statistics Canada Street Network File User Guide 1 INTRODUCTION 1 1 Preface The Street Network File User Guide is intended to provide information on the context quality and content of the Street Network Files SNFs It includes a brief overview of
12. an alley or lane For mapping purposes this category is divided into the following 1 Single Street 3 lanes or less without a median 2 Multiple Street 4 lanes or more without a median or 2 lanes or more with a median NOTE For all of the above cases if the total road width is 100 metres or more the feature will be defined as 2 parallel single streets Telephone Line A wire used for transmitting telephone signals The AMF recognizes only major ones Trail A track or path located in a park Statistics Canada Page 39 Street Network File User Guide Tunnel A subterranean passageway usually carrying a railway road or canal Under Construction The term used to indicate that the feature on the map is not completed but that construction has started i Statistics Canada 9 Page 40 Street Network File User Guide 6 SUPPLEMENTARY INFORMATION 6 1 For Further Information For further information on the Street Network File or other products and services available from the Geography division contact your nearest Regional Reference Centre If you live outside the local dialing area call one of the toll free numbers provided in the list that follows Newfoundland and Labrador Statistics Canada Advisory Services 3rd Floor Viking Building Crosbie Road St John s Newfoundland 1 3 2 Local calls 709 722 4073 Toll free 1 800 563 4255 Fax 1 709 772 6433 Maritime Provinces Statistics Ca
13. zone of the representative point UTM X The X coordinate of the representative point UTM Y The Y coordinate of the representative point CEN LEFT CEN RGHT These redefinc the Representative point id to relate to the AAT items Page 26 Statistics Canada Street Network File User Guide LIST A FEATURE CLASSIFICATION Roadway railway and associated features category Feature Type b Addressable Single street amp public access lane E Addressable Multiple street amp public access lane HSI Highway single HMU Highway multiple HPR Highway proposed HUC Highway under construction H Other Higbway BSI Bridge or Tunnel Single Highway or Addressable Multiple street BMU Bridge or Tunnel Multiple Highway BMN Bridge or Tunnel Addressable Single street B Other Bridge or Tunnel R Other Railway features RSI Railway single track RMU Railway multiple track RSG Railway siding or yard FRA Ramp FWA Walkway FEX Feature extension F Other Roadway Associated features The characters b or bb denotes that the field is blank Statistics Canada Page 27 Street Network File User Guide LIST FEATURE CLASSIFICATION CONT D Hydrography and associated features category Feature Type WCR Creek defined using streamline WAQ Aqueduct WCA Canal WRI River W Other W
14. 88 Mar 88 OUTSIDE CMA CA Gordon River 2 R June 86 June 86 Pacheena 1 R June 86 June 86 Capital Subd D SDR June 86 June 86 _ Statistics Canada Page 17 Street Network File User Guide 4 TECHNICAL SPECIFICATIONS 4 1 Physical Media Description THE PHYSICAL FORMAT OF THE SNF IS DESCRIBED IN THE LETTER WHICH ACCOMPANIES THIS PRODUCT 4 2 How to Use the SNF The SNF is in ARC Export format It was created using the following ARC commands EXPORT COVER NET nnn NET nnn E00 EXPORT COVER PNT nnn PNT nnn E00 where nnn is the code of the CMA included in the coverage The ARC Info coverage can be restored using the following commands IMPORT COVER NET nnn E00 COVER IMPORT COVER PNT nnn E00 COVER where COVER is the name selected by the user Statistics Canada Street Network File User Guide e 4 3 Info Tables The execution of the commands outlined in the previous section will result in the creation of a coverage called COVER and the following Info tables S DATAFILE NAME COVER AAT 20 ITEMS STARTING IN POSITION COL ITEM NAME 1 5 9 13 17 25 29 33 41 49 57 60 80 82 84 89 94 99 104 108 FNODE TNODE LPOLY RPOLY LENGTH COVER COVER ID ARC_ID LPOLY_ID RPOLY_ID CLASS NAME TYPE DIRECTION ADDR_FM_LEFT ADDR_TO_LEFT ADDR_FM_RGHT ADDR_TO_RGHT CEN_LEFT CEN RGHT WDTH OPUT 4 5 4 5 4 5 204 5 8 8 4 5 4 8 8 8 8 8 8 8 3 3 20 0 2 2 2 2 5 5 5 5 5 5
15. NOTE For all of the above cases if the total road width is 100 metres or more the feature will be defined as 2 parallel single nighway Hydro Line The complex of wires and pylons used in the transmission of electrical power Tbe AMF recognizes only major ones Intersection The junction of any two features except property boundaries Statistics Canada Page 37 Street Network File User Guide Island A body of land completely surrounded by water or marsh Lake A large inland body of salt 2 fresh water entirely surrounded by land and larger than a pond Node A geographic point with xy coordinates which is placed at every feature intersection and change of direction Park An area set aside for recreation also an area maintained in its natural state as public property Pipeline A cylindrical passage of a substantial length for the transport of fluids or gases Pond A natural body of standing fresh water occupying a small surface depression usually smaller than lake Proposed Road ue A road that is in the planning stage Railway A permanent way having rails which provide a track for train cars 1 Single Track Railway a single railway line normally of standard gauge 2 Multiple Track Railway two or more closely parallel rail lines Railway Siding A single railway track parallel to a second track used for temporary storage of cars or for the passing of trains Railway Yard A system of railway track
16. Page 30 Statistics Canada Street Network File User Guide LIST B STREET TYPE LIST Street Interpretation Street Interpretation Type Type bb No type Pas de type LI Line AL Alley All e LK Link AU Autoroute LN Lane AV Avenue ME Mews BA Bay By Pass PL Place BV Boulevard PM Promenade CA Carr PR Park CH Chemin PU Plateau CL Circle Cercle PY Parkway CN Concession RD Road CO C te RG Rang CR Crescent Croissant RI Rise Cs Close RL Ruelle CT Court RO Route DR Drive RU Rue GA Garden RW Row GR Green SQ Square GT Gate ST Street GV Grove TL Trail HL Hill TR Terrace Terrasse HT Heights VW View HY Highway WK Walk JS Jardin WY Way Statistics Canada Page 31 Street Network File User Guide LIST C FEATURE DIRECTION The feature direction is not to be mistaken as being the geographic direction of a feature but the direction used within the feature s identification NORTH NORD ij 2 SOUTH SUD EAST EST WEST N S E W OUEST NE NW NORTH EAST NORD EST NORTH WEST NO NORD OUEST SE SOUTH EAST SUD EST SW SOUTH WEST SO SUD OUEST Statistics Canada Page 32 Street Network File User Guide 4 4 Data Item Regulations And Clarifications The following section lists regulations and clarifications concerning SNF data items These SNF particulars may be of importance to the user in helping to reduce the possibility of misinterpretation Addresses
17. all stream indicated by a single line or streamline Dam barrier to prevent the flow of water or to raise and control the level of water where the water body is defined by shorelines Ditch trench dug in the earth as for drainage or irrigation Statistics Canada Street Network File User Guide Page 36 Enumeration Area EA An enumeration area EA is the geographic area canvassed by one census representative Falls A waterfall where the associated water body is defined by shorelines Feature An entity that will be included in the Street Network File Feature Extension An extension projection of a feature for internal operations It is defined from the feature end point to the extension end point Federal Electoral District FED A federal electoral district refers to any place or territorial area entitled to return a member to serve in the House of Commons Source Canada Elections Act 1990 There are 295 FEDs in Canada according to the 1987 Representation Order Government The exercise of authority over a district In this case refers to any level municipal provincial and federal Highway A main road or thoroughfarc For mapping purposes this feature is divided into the following 1 Single Highway A highway with 3 lanes or less without a median fence grass etc 2 Multiple Highway A highway with 4 lanes or more without a median or a highway with 2 lanes or more with a median
18. ater body defined using streamline SCR Creek defined using shoreline SAQ Aqueduct SCA Canal SRI River SLA Lake SPO Pond SRE Reservoir SOC Ocean S Other Waterbody defined using shorelines IFA Falls IDA Dam I Other Associated features Statistics Canada e Page 28 Street Network File User Guide LIST A FEATURE CLASSIFICATION CONT D Delimiter and associated features category Feature Type MMU Municipal Boundary MPR Provincial Boundary MNA National Boundary MFE Federal Electoral District Boundary M Other Political boundaries CEA Enumeration Area Boundary Other Geostatistical area boundaries GPA Park Boundary GGO Golf Boundary GAI Airport Boundary GHO Hospital Boundary G Other Property boundaries GSH Shopping Centre Boundary GSC School Boundary GCO College Boundary GUN University Boundary GJA Jail Boundary GCH Church Boundary GGT Government Boundary U Other Urban Rural boundaries Statistics Canada Page 29 Street Network File User Guide LIST A FEATURE CLASSIFICATION CONT D General Features Category Feature Type PPA Park PGO Golf PHO Hospital PAI Airport PSH Shopping centre PSC School PCO College PUN University PJA Jail PCH Church PGT Government P Other Point features OFA Cliff ODI Ditch Other Topography features ZHY Hydroline Major ZTE Telephone line Major ZFE Fence ZPI Pipeline Z Other features D Alias features
19. ce materials 3 inconsistency in control points used for digitizing the same area at different times The quality of data in each Street Network File depends on the quality of the inputs and on the quality of the manual processes which are used to capture the available information In particular it should be noted that the quality cannot exceed the quality of the base maps used The actual type and scales used varies considerably from one Street Network File to another Manual digitizing is subject to normal error rates for this operation bearing in mind that the training and expertise of the staff has varied over time The entry of attribute data is subject to typical error rates for data capture but the actual error rates have not been measured Statistics Canada Page 4 Street Network File User Guide Data Quality Statement Cont d Most updates to street network files involve adding new features or missing attributes to existing features However some updates which involve the deletion or modification of existing features in a street network file are more difficult because it is necessary to identify that the existing network bas changed a process which continues to rely on manual comparisons of maps and is relatively prone to missing cbanges 2 4 Logical Consistency A Result of Integration Logical consistency is required within and between street network files The processing of digitized data within ARC INFO ensures i
20. e aware that some streets and address ranges found in the census have not yet been added to the Street Network Files Chart 1 shows a distribution of reference dates for both network and address components of street networks To show a truer picture the CSDs have been weighted by population rather than counting CSDs equally Each bar in the chart shows the cumulative percentage of population covered by street network files updated to the specified year The percentages are calculated using the total population in all street network files as the base CSDs containing 3746 of the population have had the network component updated to 1991 and 8896 by population have been updated to at least 1988 Howevet the corresponding updating of address information has not been done for many of the Street Network Files Only 1 by population has been updated to 1991 and only 28 to at least 1988 Nearly two thirds of the street networks by population still have address information with a 1986 reference date Consequently address ranges likely to be significantly incomplete for many of the high growth areas of the Street Network Files For those which have not been updated since 1986 the effects will vary according to the extent of growth and change over the last five years The lack of updating to address ranges reflects the fact that the Census has been the principal source of address information and the address updates from the 1991 Census have not been appli
21. ed to the Street Network Files 2 3 Positional Accuracy Absolute vs Relative The primary purpose of street networks has been to support Census mapping and geocoding Consequently positional accuracy of the nodes in the network compared to ground truth was not a serious concem Relative positional accuracy has been important to producing reference maps and in this respect topological correctness is regarded as essential Both geocoding and the retrieval and display of Census data require consistency between street network features and enumeration area boundary files A number of procedures and verifications were implemented to ensure this type of consistency Refer to the EA Digital Boundary File Data Quality Statement for further information Statistics Canada Page 3 Street Network File User Guide Cumulative Percent Updated POPULATION BY YEAR PERCENT UPDATED af ote tete OON PS NETWORK ADDRESSES Data Quality Statement Cont d However the absolute positional accuracy of network nodes varies considerably even within the same street network files Some limited studies of positional accuracy have indicated that errors of up to and occasionally beyond 100 metres do occur Such problems generally localized in small portions of a Street Network File and arise from three sources 1 digitizing from hand drawn maps of streets when up to date maps were not available 2 variable scales of update sour
22. er he Statistics Statistique Canada Canada The Street Network ile User Guide ARC INFO Export Format How to Reach Us To Obtain More Information Inquiries about products and services should be directed to one of the following Statistics Canada Reference Centres St John s Halifax Montr al Ottawa Toronto Winnipeg R gina Edmonton Calgary Vancouver A toll free number is provided in all provinces and territories for users who reside outside the local dialing area of any of the Regional Reference Centres Newfoundland and Labrador Terre Neuve et Labrador Nova Scotia New Brunswick and Prince Edward Island Pour nous joindre Comment obtenir d autres renseignements Toute demande de renseignements au sujet des produits et services doit tre adress e l un des Centres de consultation de Statistique Canada suivants 709 772 4073 902 426 5331 514 283 5725 613 951 8116 416 973 6586 204 983 4020 306 780 5405 403 495 3027 403 292 6717 604 666 3691 Un num ro d appel sans frais est offert dans toutes les provinces et territoires aux utilisateurs qui habitent l ext rieur du secteur d appel local des Centres r gionaux de consultation 1 800 565 7192 1 800 565 7192 Nouvelle cosse Nouveau Brunswick et le du Prince Edouard Quebec Qu bec Ontario Manitoba Saskatchewan Alberta Southern Alberta Sud de l Alberta British Columbia South and Ce
23. erta T2G 4Z6 Local calls 403 292 6717 Toll free 1 800 472 9708 Fax 1 403 292 4958 British Columbia and Yukon Statistics Canada Advisory Services Suite 440F 3rd Floor Federal Building Sinclair Centre 757 West Hastings St Vancouver British Columbia V6C 3C9 Local calls 604 666 3691 Toll free 1 800 663 1551 except Atlin B C Yukon and Atlin B C Zenith 08913 Fax 1 604 666 4863 Alberta and Northwest Territories Statistics Canada Advisory Services 8th Floor Park Square 10001 Bellamy Hill Edmonton Alberta T5J 3B6 Local calls 403 495 3027 Toll free 1 800 282 3907 N W T Call collect 1 403 495 3028 Fax 1 403 495 3026 Page 41 Statistics Canada Street Network File User Guide Page 42 BIBLIOTHEQUE STATISTIQUE CANADA 1010183893 6 2 Additional References and Services In addition to the Regional Reference Centres and depository libraries Statistics Canada publications may be ordered through your local bookstore or subscription agent Contact the nearest Regional Reference Centre for a list of Canadian outlets available or consult the 1991 Census Catalogue Catalogue No 92 302E Secondary distributors offer data access and analytical support through a variety of consulting and computer based services not available at Statistics Canada The names and addresses of licensed distributors may be obtained from any Regional Reference Centre Statistics Canada provides digita
24. f Data Sources and Reference Dates Sources The quality of each street network file depends on the collection and processing of information about changes in the real world The primary sources of updating have been maps and descriptive information from municipalities the enumeration records and field maps from the quinquennial Census of Population and Housing and other sources for addresses and non street features Municipalities provide a variety of documents which may include street maps printouts of digital street network files development plans and manually drafted corrections entered on street network plots provided by Geography Division While the scales of these source maps vary widely most are within the range of 1 1000 to 1 30 000 Scales of 1 5 000 1 10 000 and 1 25 000 are used most frequently The National Topographic Series NTS 1 50 000 map sheets produced by Energy Mines and Resources Canada and the Ontario Base Maps OBM were used as the basis for the initial creation of some SNFs These maps were also used as a source of information to provide certain classes of more stable features e g hydrography in areas not covered by municipal information Because street networks are updated periodically a typical street network file is a composite of information entered at various times over a period of years Consequently data quality may be uneven within the same SNF This is mainly because the quality of source documents has varied o
25. ft hand side of the arc at the TO node 17 ADDR FM RGHT The civic address found on the right hand side of the arc at the FROM node 18 ADDR TO RGHT The civic address found on the right hand side of the arc at the TO node 19 CEN LEFT The identifier for the representative point of the block face on the left 20 RGHT The identifier for the representative point of the block face on the right Page 20 Statistics Canada Street Network File User Guide DATAFILE NAME COVER PAT 6 ITEMS STARTING IN POSITION COL ITEM NAME 1 AREA 9 PERIMETER 17 COVER 21 COVER ID 25 POLY ID 33 CSD NOTE A description of this table can be found on the following page 2 gt WDTH OPUT TYP N DEC ALTERNATE NAME 8 8 4 4 8 7 18 18 Jour LI 1 1OONH SDR Page 21 Statistics Canada Street Network File User Guide Item Description Polygon Attribute Table 1 Area of polygon maintained by ARC INFO 2 Perimeter of polygon maintained by ARC INFO 3 COVER Maintained by ARC INFO 4 COVER ID Maintained by ARC INFO 5 POLY ID Identifer for polygon 6 CSD The Standard Geographical Classification code the first two characters are province tbe next two census division the last three are census subdivision 000 Statistics Canada Page 22 Street Network File User Guide DATAFILE NAME COVER PAT 8 ITEMS STARTING IN POSITION COL ITEM NAME
26. l geographic products which allow computer manipulation of geographic data A customized retrieval service is available for users who wish to define their own geographic area of study A variety of data retrieval files and services provide flexibility in selecting a geographic base complete description of available digital files adi services is documented in the 1991 Census Catalogue Catalogue No 92 302E Information concerning Census of agriculture products and services may be referenced in the 1991 Census of Agriculture Products and Services publication Catalogue No 92 303 or by calling toll free 1 800 465 1991 Users with special data requirements may request post census survey services Data are made available on microcomputer diskettes for use with spreadsheet software or on paper output For additional information please contact the nearest Regional Reference Centre The Dissemination Division is responsible for CANSIM Statistics Canada s computerized database network and information retrieval service Users are provided with access to current and historical statistics in various forms including specialized data manipulation and analysis packages graphics facilities and a bibliographic search service For more information about CANSIM contact any Regional Reference Centre 1 STATISTICS CANADA LIBRARY Statistics Canada Street Network Flle User Guide GEOGRAPHIC PRODUCTS FEEDBACK Please tell us what you thi
27. ll be coded ECOLE DE L Formats of the word Saint and Sainte are coded as ST STE respectively All numeric streets are coded numeric without any suffix such as TH ND etc If space permits all non addressable features have the feature s qualifier in the name field ex OTTAWA LIMIT DOW S LAKE For CSDs found in the province of Quebec the qualifier is coded before the feature name ex LIMITE DE HULL i LAC LEMAY In feature names that contain a direction such as Sherbrooke est the direction is not coded in the name but in the direction field ___ Statistics Canada Page 33 Street Network File User Guide Data Jtem Regulations And Clarifications cont d Special attention should be taken for street names containing Mont e and C te as they may appear in the street name or street type Non street features which are unidentified are coded as Qualifier XXX where Qualifier is the type of feature such as lake river where XXX is a three digit number assigned arbitrarily P eg LAKE 001 for an unidentified lake Private streets are coded as PRIV in all CSDs Streets undergoing construction in Quebec CSDs are coded as E C en construction while in other CSDs they are coded as U C under construction Proposed streets in Quebec CSDs will be coded as PROJ projet es and in other CSDs as PROP proposed Railway yatds will be coded name of railway YARD XXX whe
28. mberland TP June 89 Feb 87 Gloucester C 91 91 Goulboum TP June 89 June 86 Kanata C June 89 May 88 Nepean June 89 June 86 Osgoode TP July 89 June 86 Ottawa C Oct 90 Dec 89 Rideau TP June 89 May 88 Rockcliffe Park VL June 89 June 86 Rockland T Sept 91 May 88 Vanier C June 89 Nov 88 West Carleton TP June 89 June 88 PETERBOROUGH CA Peterborough C Mar 91 June 86 SARNIA CA Moore TP June 86 June 86 Point Edward VL Jan 89 Jan 89 Sarnia Clearwater June 91 June 86 Sarnia 45 R June 91 Aug 86 Statistics Canada Page 12 Street Network File User Guide SAULT STE MARIE CA Garden River 14 Macdonald Meredith and Aberdeen Laird Prince Sault Ste Marie Rankin Location 15D OHd4d ST CATHARINES NIAGARA Fort Erie Lincoln Niagara Falls Niagara On The Lake Pelham Port Colbome St Catharines Thorold Wainfleet Welland SUDBURY CMA Sudbury THUNDER BAY CA Thunder Bay TORONTO CMA Ajax Aurora Brampton East Gwillimbury East York Etobicoke Georgina Georgina Island Halton Hills Milton King Markham Mississauga Newmarket North York Oakville Pickering Page 13 d0o0oo0onddodd o S June 86 June 86 June 86 June 86 June 89 June 89 Oct 90 July 90 Oct 90 July 90 Nov 91 July 90 Apr 91 June 88 Oct 90 July 88 Jan 91 Sept 89 June 90 June 86 June 86 June 86 June 86 June 89 J
29. nada Advisory Services North American Life Centre 3rd Floor 1770 Market Street Halifax Nova Scotia B3J 3M3 Local calls 902 426 5331 Toll free 1 800 565 7192 Fax 1 902 426 9538 Quebec Statistics Canada Advisory Services 200 Ren L vesque Blvd West Guy Favreau Complex 4th floor East Tower Montr al Quebec H2Z 1X4 Local calls 514 283 5725 Toll free 1 800 361 2831 Fax 1 514 283 9350 National Capital Region Statistics Canada Statistical Reference Centre Lobby R H Coats Building Tunney s Pasture Holland Avenue Ottawa Ontario K1A 0T6 Local calls 613 951 8116 If outside the local calling area dial the toll free number for your province Fax 1 613 951 0581 Ontario Statistics Canada Advisory Services 10th Floor Arthur Meighen Building 25 St Clair Avenue East Toronto Ontario MAT 1M4 Local calls 416 973 6586 Toll free 1 800 263 1136 Fax 1 416 973 7475 Manitoba Statistics Canada Advisory Services Suite 300 MacDonald Street 344 Edmonton Street Winnipeg Manitoba R3B 3L9 Local calls 204 983 4020 Toll free 1 800 542 3404 Fax 1 204 983 7543 Saskatchewan Statistics Canada Advisory Services 9th Floor Avord Tower 2002 Victoria Avenue Regina Saskatchewan S4P 0 7 Local calls 306 780 5405 Toll free 1 800 667 7164 Fax 1 306 780 5403 Southern Alberta Statistics Canada Advisory Services Room 401 First Street Plaza 138 4th Avenue South East Calgary Alb
30. nk of our products Send your written comments or suggestions to Marketing Section Geography Division Statistics Canada 3rd Floor Jean Talon Building Tunney s Pasture Ottawa Ontario K1A OT6 or fax them to 613 951 0569 To order or for further information contact your nearest Statistics Canada Regional Reference Centre COMMENTAIRES SUR LES PRODUITS G OGRAPHIQUES Auriez vous l obligeance de nous informer de ce que vous pensez de nos produits Faites parvenir vos commentaires ou suggestions par crit Section de Marketing Division de la g ographie Statistique Canada 3 tage difice Jean Talon Parc Tunney Ottawa Ontario K1A OT6 ou par t l copieur au 613 951 0569 Pour commander ou pour obtenir plus de renseignements communiquez avec le Centre r gional de consultation de Statistique Canada le plus proche ey am
31. nternal consistency of the topology entered Undershoots and overshoots are examined and corrected and closure of polygons is verified New pieces of network are edgematched to fit into the existing street network file It is important to ensure that the Street Network Files are consistent with other digital products digital boundary files in particular The Street Network Files are processed by census subdivision either single CSDs or groups of adjacent CSDs An edgematching process ensures that boundaries of adjacent census subdivisions coincide when merged This process often required manual intervention when boundaries differed too much to be snapped together in an automated fashion A similar process applies on a common boundary between adjacent Street Network Files It should also be noted that boundary files for areas not covered by street networks are generally adjusted to agree with the outer boundaries of street networks as these are usually more accurate Normally boundaries correspond to street network file features which would exist in their own right In the cases where this was not true an artificial feature corresponding to the boundary was created In this release of the Street Network Files for the first time this type of feature has been created for enumeration area boundaries It should be stated that the consistency sought above relates specifically to the time reference of 1991 Census As time goes on and intercensal cens
32. ntral Colombie Britannique sud et centre Yukon and Northern B C area served by NORTHWESTEL Inc 1 800 361 2831 1 800 263 1136 1 800 542 3404 1 800 667 7164 1 800 282 3907 1 800 472 9708 1 800 663 1551 Zenith Z nith 08913 Yukon et nord de la territoire desservi par la NORTHWESTEL Inc Northwest Territories area served by NORTHWESTEL Inc Territoires du Nord Ouest territoire desservi par la NORTHWESTEL Inc Telecommunications Device for the Hearing Impaired Appareil de t l communications pour malentendants Call collect 403 495 3028 appelez frais vir s 403 495 3028 1 800 363 7629 The Street Network File User Guide ARC INFO Export format Produced by the Geography Division Statistics Canada June 1992 Also available in French Egalement disponible en francais TABLE OF CONTENTS I INIRODUCTION ss sacs es ets ER Rn silence BW EE EE TEE 1 2 Overview of the SNF Content 1 3 Purpose of the Street Network Files SNF VA Coverage cvv eee E Lees IR ET RETE nt ee Ne NS rad Re 2 DATA QUALITY STATEMENT 2 lInttoduction av EN Foes dames one sono TEEN ne ni ele 2 2 Lineage A Description of Data Sources and Reference Dates 2 3 Positional Accuracy Absolute vs Relative 2 4 Logical Consistency A
33. of which are part of census metropolitan areas CMAs and census agglomerations CAs All 25 CMAs and 19 of the CAs are either wholly or partially covered In addition eleven CSD s which fall outside CMA CA limits are included These areas cover 60 of the population of Canada but less than 1 of the land area The release of the SNFs is being carried out in phases We therefore recommend that you contact your nearest Regional Reference Centre to find out which CSDs included in the SNF program are currently available M e Statistics Canada Page1 Street Network File User Guide 2 DATA QUALITY STATEMENT 2 1 Introduction e Geography Division s Street Network Files SNFs incorporate a detailed level of geocartographic information for all major urban centres The main purpose of the SNFs within Statistics Canada is to support the needs of the Census of Population and Housing More specifically the street network information is used prior to a census to define enumeration areas and to create corresponding EA maps for collection purposes Following a census it is used to create reference maps for dissemination purposes and to support the geocoding and retrieval of Census data for user defined areas The latter is the original reason for creation of the Street Network Files in the early 1970s 2 2 Lineage A Description o
34. re XXX is a unique number assigned arbitrarily ex CNR YARD 001 A Representative Point is a point used as a spatial reference for a block face The representative point is a coordinate in the Universal Transverse Mercator UTM projection which is calculated as follows The distance between all nodes comprising the block face are totalled b This total distance is divided by two c The resultant distance midpoint distance is measured back from the end point along tbe arcs segment between two nodes until the midpoint distance along the block face is reached d The representative point is located at a point perpendicular to and 22 metres back from the arc A UTM XY coordinate value is calculated for this representative point In the ARC Export format of the SNF if arc have been adjusted e g as a result of edge matching the representative points have not been moved That is the representative points may not always be 22 metres from the arc Statistics Canada Street Network File User Guide Page 34 gd 5 SNE DICTIONARY M MM M M The SNF dictionary is designed to provide information on the records or fields that are found in the various file layouts which are supplied with this product Address Range of a Block face The low and high address civic number found on a block face including commercial addresses Airport
35. s Canada Street Network File User Guide ONTARIO BRANTFORD CA Brantford C Nov 90 Junc 86 Brantford TP Apr 91 June 86 Paris T June 86 June 86 GUELPH CA Guelph June 91 Aug 90 Eramosa TP Jan 91 June 86 Guelph TP Jan 91 June 86 HAMILTON CMA Ancaster T Oct 87 Oct 87 Burlington C June 86 June 86 Dundas T Sept 87 Sept 87 Flamborough T Dec 87 Dec 87 Glanbrook TP Oct 87 Oct 87 Grimsby T June 91 June 88 Hamilton C Mar 87 Mar 87 Stoney Creek C Jan 90 Jan 90 KINGSTON CA Kingston C Oct 90 Oct 90 Kingston TP Sept90 Sept 90 KITCHENER CMA Cambridge Aug 91 June 86 Kitchener C Aug 91 June 86 North Dumfries TP Aug 91 June 86 Waterloo C Aug 91 June 86 Woolwich TP Aug 91 June 86 LONDON CMA Delaware TP June 86 June 86 Lobo TP Apr 89 Apr 89 London June 88 June 86 London TP May 89 May 89 North Dorchester TP May 91 June 86 Port Stanley VL Jan 90 June 86 Southwold TP Aug 90 June 86 West Nissouri TP Jan 90 June 86 Westminster TP Jan 89 June 86 Statistics Canada Page 11 Street Network File User Guide Belmont VL Jan 90 May 88 St Thomas C Jan 90 June 86 Yarmouth TP Aug 90 June 86 NORTH BAY CA East Ferris TP June 86 June 86 x Nippissing 10 R June 86 June 86 North Bay C May 91 June 86 North Himsworth TP May 89 June 86 OSHAWA CMA Newcastle i T Sept 89 Sept 89 Oshawa C Sept 89 Sept 89 Whitby T Sept 89 Sept 89 OTTAWA HULL CMA Ontario Part Clarence TP May 91 June 86 Cu
36. s within a prescribed limit Ramp short roadway providing access to or exit from a road or highway Statistics Canada Page 38 Street Network File User Guide Representative Point A representative point formerly called centroid is a pair of coordinate values that represents a geographic entity for the purpose of assigning aggregate data to that point For the 1991 Census representative points were generated for enumeration areas EA and block faces Enumeration area representative points are located either near clusters of buildings and or streets or at the visual centre of the EA Block face representative points are located at the mid point of the block face set back a perpendicular distance of 22 meters from the street centre line Reservoir A natural or artificial Tone place for water from which water may be withdrawn for irrigation municipal water supply etc River A natural freshwater surface body of running water that serves as a natural outlet for drainage area Indicated by shorelines Road Refer to Street Shoreline The limit of a body of water where it touches land In the SNF the water body should on average be greater than 20 metres wide and indicated by shoreline rather than streamline Streamline Used to define small creeks and rivers The centre line of a river or creek with an average width of less than 20 metres Street A thoroughfare within a city or town larger than
37. the SNFs a Data Quality Statement a detailed description of the files and also features a dictionary of the terms found in the SNFs as well as a list of Statistics Canada s Regional Reference Centres 1 2 Overview of the SNF Content The Street Network Files are digital data files stored in computer readable format which define the street network for large urban centres in Canada The files also show physical and cultural features within a specific geographic area usually a census subdivision CSD An SNF references streets address ranges block face representative point coordinates and includes such features as rivers railroad tracks and municipal boundaries which are the basic elements found on a user reference map 1 3 Purpose of the Street Network Files SNF The Street Network Files SNF formerly known as the Area Master Files or AMFs were first created in the early 1970s as the basis for retrieval of Census data for user defined geographic areas More recently the SNFs bave also been used in Census data collection specifically in the delineation of Enumeration Areas and the automated production of collection maps In addition the files have been used in the creation of the Digital Boundary Files and the Postal Code Conversion File These and other geography products can also be obtained from your local Statistics Canada Regional Reference Centre 14 Coverage The currently cover 342 municipalities CSDs the majority
38. unc 89 July 88 June 86 Sept 89 Aug 89 Jan 89 June 86 Jan 90 June 86 June 86 June 86 June 86 May 88 June 86 June 86 June 86 Aug 89 June 86 Jan 89 June 86 Statistics Canada Street Network File User Guide Richmond Hill T Aug 90 Jan 89 Scarborough C Jan 90 June 86 Toronto C Jan 90 June 86 Uxbridge TP Sept 89 Sept 89 Vaughan C July 90 June 86 Whitchurch Stouffville T July 90 June 86 York C Jan 90 Jan 90 KR WINDSOR CMA Colchester North TP Jan 86 Jan 86 Essex T June 86 June 86 Windsor C July 88 June 86 WOODSTOCK CA Woodstock C June 86 June 86 BELLEVILLE CA Belleville C Dec 88 June 86 STRATFORD CA Stratford C June 86 June 86 OUTSIDE CMA CA BROCK Ontario Brock TP Sept 89 Sept 89 FERGUS Ontario Fergus T Feb 89 Feb 89 SCUGOG Ontario Scugog TP Sept 89 Sept 89 Scugog 34 R Sept 89 Sept 89 WELLESLEY Ontario Wellesley TP Aug 91 Aug 88 WEST LINCOLN Ontario West Lincoln TP Oct 90 Oct 90 WILMOT Ontario 1 Wilmot TP Aug 91 Aug 88 Statistics Canada Page 14 Street Network File User Guide MANITOBA WINNIPEG CMA East St Paul RM June 86 June 86 Ritchot RM June 86 June 86 Rosser RM June 86 June 86 Springfield RM June 86 June 86 St Francois Xavier RM June 86 June 86 Tache RM June 86 June 86 West St Paul June 86 June 86 Winnipeg C Feb 91 Mar 89 OUTSIDE CMA CA BENITO Manitoba Benito VL June 86 June 86 SASKATCHEWAN REGINA
39. une 86 June 86 Langley 5 R June 86 June 86 Maple Ridge DM Mar 90 June 86 Whonnock 1 R June 86 June 86 New Westminster 89 June 86 North Vancouver Jan 91 June 86 Mission R Jan 91 June 86 North Vancouver DM Jan 91 June 86 Statistics Canada Page 16 Street Network File User Guide Burnard Inlet 3 R Jan 91 June 86 Seymour Creek 2 R Jan 91 June 86 Pitt Meadows DM June 86 June 86 Port Coquitlam C May 91 June 86 Coquitlam 2 R May 91 June 86 Port Moody C Jan 90 Jan 89 Richmond c Feb 91 June 86 Surrey DM June 91 June 86 University Endowment Area SDR Junc 86 June 86 Vancouver C Oct 90 June 86 Musqueam 2 R June 86 June 86 West Vancouver DM June 91 June 86 Capilano 5 R June 91 June 86 White Rock C Jan 89 Junc 86 Semiahmoo R Jan 89 June 86 VICTORIA CMA Becher Bay 1 R June 86 June 86 Becher Bay 2 R June 86 June 86 Capital Subd B SDR June 86 June 86 Colwood C Oct 89 Oct 89 Esquimalt R June 86 June 86 Metchosin DM June 89 June 89 New Songhees 1 CA June 86 June 86 View Royal Oct 89 Oct 89 Capital Subd CSDR June 86 June 86 Sooke 1 R June 86 June 86 Sooke 2 R June 86 June 86 Central Saanich DM June 88 June 86 East Saanich R June 86 June 86 South Saanich R June 86 June 86 Esquimalt DM Sept 89 Sept 89 Cole Bay 3 R June 86 June 86 North Saanich DM Jan 90 June 86 Union Bay 4 R June 86 June 86 Oak Bay DM Jan 90 Jan 90 Saanich DM Feb 89 June 86 Sidney T June 86 June 86 Victoria C Mar
40. us subdivision boundary changes accumulate the chances of discrepancies arising increases as these relationships are controlled manually 2 5 Completeness Non Street Features While the Street Network Files contain many non street features e g railways hydrography parks cliffs the complete representation of these secondary features was neither intended nor guaranteed In general these were included where they appeared in base maps and update materials and were deemed to be of importance to street network file users Also the updating of these features may have been less rigorous than the street network and its attributes The enumeration area boundary features mentioned in section 2 4 are not complete 111 of these segments were not included during processing but are documented 2 6 Limitations on Use The major limitation in using these files is likely to be the lack of address range information in areas of population growth Thus if the files are to be used for computer aided dispatch or similar purposes which require an address to be matched to a block face it may be necessary to supplement the file with local knowledge In addition because absolute positional accuracy is not the priority in the creation of the SNFs these files are NOT recommended for engineering applications Statistics Canada Page 5 Street Network File User Guide Data Quality Statement Cont d 2 7 Two Formats What are the Differences The Street
41. ver time and sometimes lower quality input documents are used rather than omitting updates altogether This is consistent with the emphasis on completeness over absolute positional accuracy Each street network file consists of street network information on the one hand and attribute information on the other In many cases the reference date of the street network and the attribute data differ In real terms this means that new streets may be added to the street network while attributes i e address ranges are left to a subsequent updating cycle While feature attributes such as street names are almost always added with the feature itself address ranges are frequently unavailable when a street is first added to the file Updating of street network files is not a continuous process for operational reasons The overhead costs of assembling input materials and the computer processing of updates have made frequent updating impractical Statistics Canada Street Network File User Guide Page 2 Data Quality Statement Cont d Reference Dates The current release of the Street Network Files was scheduled to correspond to the release of 1991 Census data and is the version used for 1991 geocoding For this reason the timely release of these files was deemed to be important to many users Although these Street Network Files are labelled as 1991 versions and reflect the most recent updates the user should be aware that the year refers to the chronolog
42. y of the release only All files have been updated to at least June 1986 however the current reference dates of specific street networks vary between June 1986 and December 1991 for the network information and between June 1986 and February 1991 for address information Refer to Section 3 for the detailed reference dates by CSD These reference dates refer to the date identified on update material or the date provided by the organization supplying the update material The true time reference of particular data items in the files depends on the sources used in updating In practice the detailed lineage of these inputs is often not known precisely The official reference date of a street network file is not changed when minor updates are added The Street Network Files are designed to link to the 1991 Census geography This linkage is achieved through block face representative points Ideally all census data would bc linked to block face representative points but where a Street Network File is unavailable the link is made to the enumeration area representative point This ensures that all census data can be linked Block face representative points are represented in UTM coordinates and stored as an attribute of the block face Despite the linkage to the 1991 Census it must also be stated clearly that the Street Network Files have NOT been updated using the information collected during the 1991 Census field operations Consequently the user should b
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