Arctic SDI catalogue
High Resolution Digital Elevation Model Mosaic (HRDEM Mosaic) - CanElevation Series
The High Resolution Digital Elevation Model Mosaic provides a unique and continuous representation of the high resolution elevation data available across the country. The High Resolution Digital Elevation Model (HRDEM) product used is derived from airborne LiDAR data (mainly in the south) and satellite images in the north. The mosaic is available for both the Digital Terrain Model (DTM) and the Digital Surface Model (DSM) from web mapping services. It is part of the CanElevation Series created to support the National Elevation Data Strategy implemented by NRCan. This strategy aims to increase Canada's coverage of high-resolution elevation data and increase the accessibility of the products.
Unlike the HRDEM product in the same series, which is distributed by acquisition project without integration between projects, the mosaic is created to provide a single, continuous representation of strategy data. The most recent datasets for a given territory are used to generate the mosaic. This mosaic is disseminated through the Data Cube Platform, implemented by NRCan using geospatial big data management technologies. These technologies enable the rapid and efficient visualization of high-resolution geospatial data and allow for the rapid generation of dynamically derived products. The mosaic is available from Web Map Services (WMS) and Web Coverage Services (WCS). Accessible data includes the Digital Terrain Model (DTM), the Digital Surface Model (DSM) and derived products such as shaded relief, slope and aspect.
The mosaic is referenced to the Canadian Height Reference System 2013 (CGVD2013) which is the reference standard for orthometric heights across Canada.
Source data for HRDEM datasets used to create the mosaic is acquired through multiple projects with different partners.
Collaboration is a key factor to the success of the National Elevation Strategy. Refer to the “Supporting Document” section to access the list of the different partners including links to their respective data.
Simple
- Date ( RI_367 )
- 2023-08-01
- Date ( RI_366 )
- 2020-11-27
- Status
- onGoing; enContinue RI_596
- Maintenance and update frequency
- unknown; inconnu RI_543
- Keywords ( RI_528 )
-
- Digital Elevation Model
- Digital Surface Model
- Digital Terrain Model
- LiDAR
- Shaded Relief
- Color Shaded Relief
- Slope Map
- Aspect Map
- Mosaic
- ArcticSDI_DEM
- Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )
-
- Digital elevation data
- 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
- Metadata language
- fre
- Topic category
-
- Elevation
- Begin date
- 2006-04-29
))
- Reference system identifier
- https://www.epsg-registry.org / EPSG:6140 /
- Reference system identifier
- https://www.epsg-registry.org / EPSG:4326 /
- Reference system identifier
- https://www.epsg-registry.org / EPSG:6647 /
- Distribution format
-
-
FGDB/GDB
(
10.5.1
)
- File decompression technique
- ZIP Compression Software
-
WMS
(
1.3.0
)
- Specification
- 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.ogc.org/files/06-042
-
WCS
(
1.1.1
)
- Specification
- Geospatial Consortium Inc., OpenGIS Web Coverage Service (WCS) Implementation Specification, Version 1.1.1, 2007-07-08, Reference number of this OGC® project document: 07-067r2, https://portal.ogc.org/files/07-067r2
-
HTML
(
1.0
)
-
FGDB/GDB
(
10.5.1
)
- OnLine resource
-
HRDEM Mosaic Web Map Service (WMS)
(
HTTPS
)
Web Service;WMS;zxx
- OnLine resource
-
HRDEM Mosaic Web Coverage Service (WCS)
(
HTTPS
)
Web Service;WCS;zxx
- OnLine resource
-
HRDEM Mosaic DSM Metadata
(
FTP
)
Dataset;FGDB/GDB;eng,fra
- OnLine resource
-
HRDEM Mosaic DTM Metadata
(
FTP
)
Dataset;FGDB/GDB;eng,fra
- OnLine resource
-
HRDEM Mosaic Product Viewer (English)
(
HTTP
)
Application;HTML;eng
- OnLine resource
-
HRDEM Mosaic Product Viewer (French)
(
HTTP
)
Application;HTML;fra
- OnLine resource
-
High Resolution Digital Elevation Model Mosaic (HRDEM Mosaic) - CanElevation Series - Product Specifications (English)
(
HTTPS
)
Supporting Document;PDF;eng
- OnLine resource
-
High Resolution Digital Elevation Model Mosaic (HRDEM Mosaic) - CanElevation Series - Product Specifications (French)
(
HTTPS
)
Supporting Document;PDF;fra
- OnLine resource
-
HRDEM Mosaic Hillshade DSM (English)
(
OGC:WMS
)
Web Service;WMS;eng
- OnLine resource
-
HRDEM Mosaic Hillshade DSM (French)
(
OGC:WMS
)
Web Service;WMS;fra
- Hierarchy level
- dataset; jeuDonnées RI_622
- Description
- The mosaic is generated for the DSM and the DTM both derived from LiDAR data. Each pixel in the mosaic corresponds to the value of the DSM produced from the most recent LiDAR data at that point. The grid is redefined at a resolution of 1 m using the gdal_warp function and the bilinear resampling type. The combination of the DSM is performed with the function gdal_merge. The integration of the mosaic into the Data Cube Platform is done using an ingest program in scala language whose resampling type is bilinear.
- File identifier
- 0fe65119-e96e-4a57-8bfe-9d9245fba06b XML
- Metadata language
- eng; CAN
- Character set
- utf8; utf8 RI_458
- Hierarchy level
- dataset; jeuDonnées RI_622
- Date stamp
- 2023-08-01T14:24:01
- Metadata standard name
- North American Profile of ISO 19115:2003 - Geographic information - Metadata
- Metadata standard version
- CAN/CGSB-171.100-2009
Overviews
Spatial extent
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