Canadian Digital Elevation Data
Published Friday, July 07, 2006 by CCAer | E-mail this post
I have no idea how long this has been there but Geobase
has a somewhat complete set of digital elevation files for the country at scales of 1:50,000 and 1:250,000. The files are split into east and west portions for each tile and are in USGS DEM format. The 1:250,000 set is complete
for the entire country (all 9,976,140 square kilometres of it
) while the 1:50,000 set covers about 2/3 of it and about all of its populated areas
(some of which is still in production - as indicated by the orange squares on the map to the right). Both can be browsed by drilling down through a map or by using the wms that Geobase has put up
. Registration is required to download the files but it is free. Technical specifications on the data are available from the site
in pdf format.
For a while access to base data has been more accessible in the United states than in Canada but with datasets like this that is changing. Though some essential large scale datasets are still publicly unavailable (e.g. drainage), the ease of accessing data on the Geobase
is much easier than on the USGS site
. Sometimes the simplest thing works the best.
Also available on the site is the national road network
and orthorectified Landsat images
for the country.