Canada3D is a digital elevation model (DEM) produced by the Canadian Forestry Service, Ontario region.
The DEM consists of an ordered array of ground elevations providing coverage of the entire Canadian landmass. It has been derived from the cells of the Canadian Digital Elevation Data (CDED) at the 1:250 000 scale. Canada3D is available in two forms: grids regularly spaced at 30 or 300 arc-seconds. Canada3D 30 and 300 are recorded separately in ASCII text file format. The elevation values are expressed in metres with respect to mean sea level (MSL), in accordance with the North American Datum of 1983 (NAD83).
http://ftp2.cits.rncan.gc.ca/
