Canadian Elevation Models: Difference between revisions
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[[Image:canada_elevation_model_resolution.png|right|thumb|450px|Canadian DEM (CDEM) - tiles with their resolution.]] | [[Image:canada_elevation_model_resolution.png|right|thumb|450px|Canadian DEM (CDEM) - tiles with their resolution.]] | ||
== Introduction == | == Introduction == | ||
The Canadian elevation model in its 0.75-arc-second resolution is a digital elevation model (DEM’s) produced by Natural Resources Canada (NRCan). CDEM is mainly based on elevation contours and hydrographic data from NRCan's Geospatial Data Base at the scale of 1:50,000, or at other scales provided by other provinces and territories. Temporal coverage is 1945-2011. | The Canadian elevation model in its 0.75-arc-second resolution is a digital elevation model (DEM’s) produced by Natural Resources Canada (NRCan). CDEM is mainly based on elevation contours and hydrographic data from NRCan's Geospatial Data Base at the scale of 1:50,000, or at other scales provided by other provinces and territories. Temporal coverage is 1945-2011. The source dataset holds different resolutions from 0.75-arc-second (below N69) to 3-arc-second (above N81). For consistency, windPRO always delivers the data with a 0.75 arc-second resolution - with the coarser tiles being resampled with a bi-linear algorithm. | ||
Please consult the product-specification (see link below) for more details. | Please consult the product-specification (see link below) for more details. | ||
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* '''Spatial Coverage:''' Canada | * '''Spatial Coverage:''' Canada | ||
* '''Resolution:''' | * '''Resolution:''' | ||
** 0.75 arc-second (approximately 20m) in windPRO | ** 0.75 arc-second (approximately 20m) in windPRO | ||
** Source data | ** Source data: 0.75 arc-second resolution below N69, 3-arc-seconds north of N81, other areas are typically 1.4 arc-second resolution<br>(see image to the right). | ||
* '''Data-type:''' [[:Category%3ADigital_Elevation_Models#What_type_of_elevation_model.3F_DEM.2C_DSM_and_DTM.3F|Digital Elevation Model (DEM)]] | * '''Data-type:''' [[:Category%3ADigital_Elevation_Models#What_type_of_elevation_model.3F_DEM.2C_DSM_and_DTM.3F|Digital Elevation Model (DEM)]] | ||
* '''Coordinate system:''' | * '''Coordinate system:''' | ||
Revision as of 15:10, 7 August 2024
NOTE 2024-08-04: This dataset is currently being integrated with windPRO.
Introduction
The Canadian elevation model in its 0.75-arc-second resolution is a digital elevation model (DEM’s) produced by Natural Resources Canada (NRCan). CDEM is mainly based on elevation contours and hydrographic data from NRCan's Geospatial Data Base at the scale of 1:50,000, or at other scales provided by other provinces and territories. Temporal coverage is 1945-2011. The source dataset holds different resolutions from 0.75-arc-second (below N69) to 3-arc-second (above N81). For consistency, windPRO always delivers the data with a 0.75 arc-second resolution - with the coarser tiles being resampled with a bi-linear algorithm.
Please consult the product-specification (see link below) for more details.
Dataset Overview
- Spatial Coverage: Canada
- Resolution:
- 0.75 arc-second (approximately 20m) in windPRO
- Source data: 0.75 arc-second resolution below N69, 3-arc-seconds north of N81, other areas are typically 1.4 arc-second resolution
(see image to the right).
- Data-type: Digital Elevation Model (DEM)
- Coordinate system:
- Horizontal: Geographic WGS - NAD83 (EPSG:4617)
- Vertical: Canadian Height Reference System, 1928 (CGVD28)
- Version: WindPRO holds the version 1.0 (downloaded august 2024)
- Vertical Accuracy: N/A
Availability from within WindPRO
The data are available directly from within windPRO in 1-arc-second (~20-meter) resolution. The data can be accessed from the online-services in the following objects:
- Line Object (with purpose to height contour lines)
- Elevation Grid Object
License and Attribution
The product belongs to the open data of Natural Resources Canada (NRCan). The data have been licensed under a ‘ Open Government Licence – Canada (version 2.0)' - see here. Please accept the license conditions and use a proper attribution when using this dataset, such as:
Contains: CDEM elevation data from Natural Resources Canada (NRCan). License: Open Government Licence – Canada. Source: Distribution through EMD and windPRO.
Acknowledgement
- Natural Resources Canada (NRCan) and the pubic of Canada are thanked for producing this digital elevation dataset – and disseminating it in the public domain - and thus for aiding the development of renewable energy.