Canadian Digital Elevation Model, 1945-2011

This collection is a legacy product that is no longer supported. It may not meet current government standards.

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.

The CDEM stems from the existing Canadian Digital Elevation Data (CDED). In these data, elevations can be either ground or reflective surface elevations.

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.

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.

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.

Date ( RI_366 ): 2012-11-06

Date ( RI_367 ): 2015

RI_414

Government of Canada; Natural Resources Canada;Strategic Policy and Innovation Sector

Canada

Presentation form: modelDigital; modèleNumérique RI_393

Status: historicalArchive; archiveHistorique RI_594

Maintenance and update frequency: notPlanned; nonPlanifié RI_542

Update scope: dataset; jeuDonnées RI_622

Keywords ( RI_525 )

Canada

Keywords ( RI_524 )

Earth Sciences
elevation
relief
geomatics

Keywords ( RI_529 )

GeoBase
CDEM
DEM
CDED

Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )

Geographic information systems
Geomatics
Earth sciences
Cartography
Geography
Geographic data
Topography

Use limitation: Open Government Licence - Canada (http://open.canada.ca/en/open-government-licence-canada)

Access constraints: license; licence RI_606

Use constraints: license; licence RI_606

Spatial representation type: grid; grille RI_636

Metadata language: eng; CAN

Metadata language: fra; CAN

Character set: utf8; utf8 RI_458

Topic category

Elevation

Begin date: 1945

End date: 2011

Reference system identifier

https://www.epsg-registry.org / EPSG:4617 / 8.6.2

Date ( RI_366 ): 2010-11-02

RI_409

Distribution format

WMS ( 1.3.0 )

Specification

Open Geospatial Consortium Inc., OpenGIS Web Map Service (WMS) Implementation Specification, Version 1.3.0, 2006-03-15, Reference number of this OGC® project document: 06-042 (https://portal.opengeospatial.org/files/?artifact_id=14416)
GeoTIF ( N/A )

File decompression technique

ZIP
ASCII Grid ( N/A )

RI_412

Government of Canada; Natural Resources Canada;Strategic Policy and Innovation Sector

Canada

OnLine resource: Canadian Digital Elevation Model, Color Shaded Relief ( OGC:WMS )
Web Service;WMS;eng

OnLine resource: Canadian Digital Elevation Model, Color Shaded Relief ( OGC:WMS )
Web Service;WMS;fra

OnLine resource: Download directory to pre-packaged GeoTIFF files ( HTTPS )
Dataset;GeoTIF;eng,fra

OnLine resource: Canadian Digital Elevation Model - Product Specifications ( HTTPS )
Supporting Document;PDF;fra

OnLine resource: Cloud Optimized GeoTIFF of the CDEM ( HTTPS )
Dataset;GeoTIF;eng,fra

OnLine resource: Cloud Optimized GeoTIFF of the CDEM hillshade ( HTTPS )
Dataset;GeoTIF;eng,fra

OnLine resource: Canadian Digital Elevation Model - Product Specifications ( HTTPS )
Supporting Document;PDF;eng

OnLine resource: CDEM product index (drag and drop the kmz file in Google Earth to localize your region of interest) ( HTTPS )
Supporting Document;KMZ;eng,fra

OnLine resource: NTS Index (Use to identify the number of your area of interest) ( HTTPS )
Supporting Document;HTML;fra

OnLine resource: NTS Index (Use to identify the number of your area of interest) ( HTTPS )
Supporting Document;HTML;eng

OnLine resource: Documentation on the use of the Elevation API ( HTTPS )
Supporting Document;HTML;eng

OnLine resource: Customized files and derived products in ASCII Grid format (Geospatial-Data Extraction tool) ( HTTPS )
Dataset;ASCII Grid;eng

OnLine resource: Customized files and derived products in ASCII Grid format (Geospatial-Data Extraction tool) ( HTTPS )
Dataset;ASCII Grid;fra

OnLine resource: Customized files and derived products in GeoTIFF format (Geospatial-Data Extraction tool) ( HTTPS )
Dataset;GeoTIF;fra

OnLine resource: Customized files and derived products in GeoTIFF format (Geospatial-Data Extraction tool) ( HTTPS )
Dataset;GeoTIF;eng

OnLine resource: Documentation on the use of the Elevation API ( HTTPS )
Supporting Document;HTML;fra

Hierarchy level: dataset; jeuDonnées RI_622

Description: The source digital data for the CDEM are the existing Canadian Digital Elevation Data (CDED). The latter were extracted from the hypsographic and hydrographic elements of the National Topographic Data Base (NTDB) at the scale of 1:50 000, the Geospatial Database (GDB), various scaled positional data acquired by the provinces and territories, or remotely sensed imagery.

The horizontal reference system is the North American Datum of 1983 (NAD83 (CSRS)); the vertical reference system is the Canadian Geodetic Vertical Datum of 1928 (CGVD28)).

Metadata describing the source data and the product generation process is made available when extracting a CDEM mosaic.