Description

**ATTENTION! The files in this dataset are designed for streaming, not downloading. For the best experience, please follow the instructions available in the resources.** In replacement of the former Canadian Digital Elevation Model (CDEM) that is no longer supported, 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 (AIRBUS, 2022), 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-30-DSM is partially based on the GLO-30 version of the Copernicus DEM** (hereafter named GLO-30). Since elevation values from the GLO-30 are referenced to the EGM2008 geoid model, they were transformed to the Canadian Height Reference System of 2013 (CGVD2013), using the CGG2013 geoid model. Where available, the MRDEM-30-DSM integrates surface data from the lidar-derived HRDEM mosaic, resampled from 1 m to 30 m. The process to generate the MRDEM-30-DTM is more complex. 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 1m to 30m. 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. Both datasets are projected to Canada Atlas Lambert NAD83 (CSRS) (EPSG:3979). The MRDEM is referenced to the CGVD2013 which is the reference standard for orthometric heights across Canada. The product Medium Resolution Digital Elevation Model (MRDEM) is part of the CanElevation Series created in support to the National Elevation Data Strategy implemented by NRCan. ** This product was in part produced using Copernicus WorldDEM-30 © DLR e.V. 2010-2014 and © Airbus Defence and Space GmbH 2014- 2018 provided under COPERNICUS by the European Union and ESA; all rights reserved. The organisations in charge of the Copernicus program by law or by delegation do not incur any liability for any use of the Copernicus WorldDEM-30.

Resources

Name	Format	Description	Link
DSM hillshade GDAL virtual format (VRT)	Unknown		https://canelevation-dem.s3.ca-central-1.amazonaws.com/mrdem-30/mrdem-30-dsm-hillshade.vrt
DSM GDAL virtual format (VRT)	Unknown		https://canelevation-dem.s3.ca-central-1.amazonaws.com/mrdem-30/mrdem-30-dsm.vrt
DTM hillshade GDAL virtual format (VRT)	Unknown		https://canelevation-dem.s3.ca-central-1.amazonaws.com/mrdem-30/mrdem-30-dtm-hillshade.vrt
DTM GDAL virtual format (VRT)	Unknown		https://canelevation-dem.s3.ca-central-1.amazonaws.com/mrdem-30/mrdem-30-dtm.vrt
MRDEM source GDAL virtual format (VRT)	Unknown		https://canelevation-dem.s3.ca-central-1.amazonaws.com/mrdem-30/mrdem-30-source.vrt
MRDEM Web Map Service (WMS)	WMS		https://datacube.services.geo.ca/ows/mrdem?request=getcapabilities&service=wms
SpatioTemporal Asset Catalog (STAC) Application Programming Interface (API)	JSON		https://datacube.services.geo.ca/stac/api/search?collections=mrdem-30
Hillshade map of the Digital Terrain Model	WMS		https://datacube.services.geo.ca/wrapper/ramp/ogc/mrdem?request=GetCapabilities&service=WMS&version=1.3.0&layers=dtm-hillshade&legend_format=image%2Fpng&feature_info_type=text%2Fxml
Hillshade map of the Digital Terrain Model	WMS		https://datacube.services.geo.ca/wrapper/ramp/ogc/mrdem?request=GetCapabilities&service=WMS&version=1.3.0&layers=dtm-hillshade&legend_format=image%2Fpng&feature_info_type=text%2Fxml
Medium Resolution Digital Elevation Model (MRDEM) - CanElevation Series - Product access guide (French)	PDF		https://download-telecharger.services.geo.ca/pub/elevation/dem_mne/MRDEM_MNEMR/CanElevation-MNEMR-Guide-Utilisation.pdf
Medium Resolution Digital Elevation Model (MRDEM) - CanElevation Series - Product access guide (English)	PDF		https://download-telecharger.services.geo.ca/pub/elevation/dem_mne/MRDEM_MNEMR/CanElevation-MRDEM-Usage-Guide.pdf
Medium Resolution Digital Elevation Model (MRDEM) - CanElevation Series - Product Specifications (French)	PDF		https://ftp.maps.canada.ca/pub/elevation/dem_mne/MRDEM_MNEMR/CanElevation-MNEMR-Specification-Produit.pdf
Medium Resolution Digital Elevation Model (MRDEM) - CanElevation Series - Product Specifications (English)	PDF		https://ftp.maps.canada.ca/pub/elevation/dem_mne/MRDEM_MNEMR/CanElevation-MRDEM-Product-Specifications.pdf

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