Source:

Statistics Canada, Data Liberation Initiative

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Description:

Street Network Files are detailed street grid maps, which can be used in conjunction with other types of Census geography files. They are available only within Census Metropolitan Areas. They include street names, and street numbers associated with the to/from node attributes.

SNF digital files are available for 1996 Census and 1991 Census. The example shown here is for the Census Metropolitan Area of Hamilton in 1996.

File format: ArcInfo Export format (.e00) or MapInfo format

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Metadata:

1) Statistics Canada, 1996 Census Dictionary (February 1997, Catalogue No. 92-351) or equivalent volume for older censuses.

• Provides definition and description for this geographical unit, and a table (Appendix M) indicating whether each Census Metropolitan Area is covered by full or partial SNF coverage.

2) Statistics Canada, 1996 Street Network and Feature Extension Reference Guide, November 1997.

• Metadata for 1996 Street Network Files
• Paper copy available in the Map Collection in the binder labelled 1996 Census: User Guides for Digital Boundary Files.
• Metadata can also be obtained as a digital file from the DLI Administrator (filename = geography/geogfiles/1996/snffrr/english/enguide.pdf).
• This metadata document is available on the University of Toronto Data Library website, if you are accessing the Internet from a McMaster domain computer and if you have Adobe Acrobat Reader software installed on your computer: http://prod.library.utoronto.ca/datalib/codebooks/c/cc96/georef/snf.pdf
• Equivalent metadata is also available for 1991

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Attribute Fields in This Coverage

• Name (street name) Example showing street name detail
• Type (street type)
• Direction (when part of street name)
• Addr_Fm_Left (civic address on left hand side of FROM node)
• Addr_To_Left (civic address on left hand side of TO node)
• Addr_Fm_Rght (civic address on right hand side of FROM node)
• Addr_To_Rght (civic address on right hand side of TO node)
• Add_Impute (indicates which addresses have been imputed)
• Class (road, railway and associated features)
• Arc_id
• Source
• Length_m

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Demo Location:

A demonstration copy of this coverage is mounted on the ArcView workstation in the Map Collection.

The demonstration shows the Street Network File for the Census Metropolitan Area of Hamilton. SNF are also available for other Census Metropolitan Areas.

d:\census\demo.apr. View = 1996 Census Boundaries Demo - Hamilton CMA

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How To Obtain These Files:

Canadian Census digital boundary files are supplied to McMaster University Library under a license agreement with Statistics Canada, which is called the Data Liberation Initiative. They are available only to affiliates of McMaster University, and may be used only for non-commercial purposes.

1) The DLI license form must be signed before the files will be delivered. Obtain a copy of this license form in the Map Collection or from the DLI Administrator (Benson Agi, Data/Text Services, Mills Library, Room 217). You must return the signed form to Mr. Agi or to the Map Collection before your request will be processed.

2) Determine the correct path and filename from the DLI ftp site. The Map Collection staff will assist you if you need help in understanding the codenames used, or the choices of file formats offered.

3) Contact the DLI Administrator (Benson Agi) to request delivery of this file. Mr. Agi will need the full path and filename, in order to deliver the correct file. He will give you information about delivery options (ftp, email, LearnLink, floppy disk).

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Contact: mapref@mcmaster.ca
Last Reviewed: September 4, 2002
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