GeoAccess Division Geomatics Canada Department of Natural Resources Canada * * * * * NATIONAL ATLAS DIGITAL DATA This directory contains 1:20 million scale National Atlas digital base map data for Canada. The data was produced by the GeoAccess Division, formerly the National Atlas Information Service (NAIS), of Geomatics Canada. GENERAL INFORMATION Scale: 1:20 000 000 Data Format: uncompressed dxf (.dxf) Data Type: 2D layered vector data Geographic Extent: Canada Transfer Method: ISO 9660 CD-ROM 3.5" diskette (DOS) 8 mm cassette (UNIX) Date: Information updated as of 1996-1997. LIABILITY The Government of Canada and the Department of Natural Resources Canada assumes NO liability for any errors or ommisions in the digital data it provides to users. SOURCE Derived from larger scale maps of the National Atlas of Canada series. Other sources of data were usually taken from maps and statistical documents produced by Canadian governmental agencies. ACCURACY/PRECISION Co-ordinate Precision: +/- 1350 metres Co-ordinate Accuracy: +/- 27 kilometres PROJECTION INFORMATION Projection: Lambert Conformal Conic Origin: 49 00 00N lat -95 00 00W long Standard Parallels: 49 00 00N 77 00 00N latitude Central Meridian: -95 00 00W longitude False northing: 0.0 meters False easting: 0.0 meters North American Datum: 1927 (NAD) Spheroid: Clarke 1866