DOI: https://doi.org/10.5069/G9N8780J OT Collection ID: OT.032025.3979.1 OT Collection Name: Medium Resolution Digital Elevation Model of Canada Short Name: CA_MRDEM Collection Platform: Airborne Lidar ---------------------------------------------------------- Download and Access Products: 1. Raster opentopoID: OTSDEM.032025.3979.1 Data Processing: https://portal.opentopography.org/raster?opentopoID=OTSDEM.032025.3979.1 ---------------------------------------------------------- Collection Overview: The Medium Resolution Digital Elevation Model (MRDEM) product is a multi-source product that integrates elevation data from the Copernicus DEM acquired during the TanDEM-X Mission, and the High Resolution Digital Elevation Model data derived from airborne lidar. This product provides a complete, 30 meters resolution, nationwide coverage for Canada. It includes a Digital Terrain Model (DTM), a Digital Surface Model (DSM) and other derived products. The spatial coverage extends into the USA, where needed, to provide coverage for cross-border watersheds in support of hydrological studies and applications. The MRDEM DSM dataset is based on the GLO-30 version of the Copernicus DEM. The process to generate the MRDEM DTM dataset is more complex and involves different sources. Where available, the HRDEM Mosaic derived from lidar was used since it already provides reliable terrain elevation values. The HRDEM Mosaic data used was resampled from 1 meter to 30 meters. Elsewhere, the processing workflow combines a forest removal model and a settlement removal model that is applied to the GLO-30 values in order to estimate the terrain elevation values. Dataset Acknowledgement: N/A Dataset Citation: Natural Resources Canada (2025). Medium Resolution Digital Elevation Model of Canada. Distributed by OpenTopography. https://doi.org/10.5069/G9N8780J. Accessed: 2025-06-06 Use License: Open Government License - Canada Dataset Keywords: Canada, lidar, DEM, TanDEM-X, Copernicus, HRDEM Survey Date: 01/01/2006 - 03/26/2025 Publication Date: 03/28/2025 ---------------------------------------------------------- Data Provider and Roles: 1. Natural Resources Canada Role: Funder Url: https://natural-resources.canada.ca/ ---------------------------------------------------------- Total number of points: N/A Area: 14,105,744 km^2 Point Density: N/A Coordinates System: Horizontal: Canada Atlas Lambert NAD83 (CSRS) [EPSG: 3979] Vertical: CGVD2013 [EPSG: 6647] Survey Report: https://object.cloud.sdsc.edu:443/v1/AUTH_opentopography/www/metadata/CA_MRDEM_metadata.zip ---------------------------------------------------------- Dataset Boundary in GeoJSON format: https://raw.githubusercontent.com/OpenTopography/Data_Catalog_Spatial_Boundaries/main/OpenTopography_Raster/CA_MRDEM.geojson Dataset Extent (Bounding Box): North: 83.50017877574942° South: 40.351550600674614° East: -52.49970901770519° West: -145.89986758193982°