cdem_dem_062I <p>This collection is a legacy product that is no longer supported. It may not meet current government standards.</p> <p>The Canadian Digital Elevation Model (CDEM) is part of Natural Resources Canada's altimetry system designed to better meet the users' needs for elevation data and products.</p> <p>The CDEM stems from the existing Canadian Digital Elevation Data (CDED). In these data, elevations can be either ground or reflective surface elevations.</p> <p>A CDEM mosaic can be obtained for a pre-defined or user-defined extent. The coverage and resolution of a mosaic varies according to latitude and to the extent of the requested area.</p> <p>Derived products such as slope, shaded relief and colour shaded relief maps can also be generated on demand by using the Geospatial-Data Extraction tool. Data can then be saved in many formats.</p> <p>The pre-packaged GeoTiff datasets are based on the National Topographic System of Canada (NTS) at the 1:250 000 scale; the NTS index file is available in the Resources section in many formats.</p> CDED CDEM Canada Cartography DEM Earth Sciences Elevation GeoBase Geographic Information Systems Geographic data Geography Relief Topography EPSG:4326 -98.00010416666666 -95.99989583333334 49.99989583333333 51.00010416666666 text/xml