Category:Digital Elevation Models: Difference between revisions

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[[File:ExampleSRTM.png|right|thumb|300px|Satellite Image with DEM Overlay. The image shows a part of the Ometepe Island in Lake Nicaragua with SRTM height contour data.]]The digital height models in WindPRO are based on open internet resources. The best globally-available DHM source remains the Shuttle Radar Topography Mission (SRTM) data, but more countries (beyond the US) are releasing national data under free-data licenses. Typically these have a much better resolution than SRTM.   
[[File:ExampleSRTM.png|right|thumb|300px|Satellite Image with DEM Overlay. The image shows a part of the Ometepe Island in Lake Nicaragua with SRTM height contour data.]]The digital height models in WindPRO are mainly based on open internet resources. The best globally-available DHM source remains the Shuttle Radar Topography Mission (SRTM) data, but more countries (beyond the US) are releasing national data under free-data licenses. Typically these have a much better resolution than SRTM - and it is often recommended to use local sources for DEM modelling - if these are available.   


== Considerations ==
== Considerations ==
When using the remote sensing digital height models, you must manually consider the accuracy of the dataset used. This is especially important in the vicinity of the wind farm and other associated objects such as  meteorological masts, noise and shadow receptors and photomontage viewpoints. Typically – when applying remote sensing DHMs - the height contour lines must be validated against a local topographical map.
When using the remote sensing digital height models, you must manually consider the accuracy of the dataset used. This is especially important in the vicinity of the wind farm and other associated objects such as  meteorological masts, noise and shadow receptors and photomontage viewpoints. Typically – when applying remote sensing DHMs - the height contour lines must be validated against a local topographical map.
== What type of elevation model - DEM, DSM and DTM ==
For wind energy applications, it is important to undserstand if the model is a DEM, DSM or a DTM. In windPRO we use the following abbriations when dealing with DEM's.
{|
|DEM
|Digital Elevation Model
|Is often used as a generic term for both DSM's and DTM's.
|-
|DSM
|Digital Surface Model
|Surface representation with objects
|-
|DTM
|Digital Terrain Model
|Bare earth representation without objects.
|}

Revision as of 10:56, 23 September 2019

Satellite Image with DEM Overlay. The image shows a part of the Ometepe Island in Lake Nicaragua with SRTM height contour data.

The digital height models in WindPRO are mainly based on open internet resources. The best globally-available DHM source remains the Shuttle Radar Topography Mission (SRTM) data, but more countries (beyond the US) are releasing national data under free-data licenses. Typically these have a much better resolution than SRTM - and it is often recommended to use local sources for DEM modelling - if these are available.

Considerations

When using the remote sensing digital height models, you must manually consider the accuracy of the dataset used. This is especially important in the vicinity of the wind farm and other associated objects such as meteorological masts, noise and shadow receptors and photomontage viewpoints. Typically – when applying remote sensing DHMs - the height contour lines must be validated against a local topographical map.

What type of elevation model - DEM, DSM and DTM

For wind energy applications, it is important to undserstand if the model is a DEM, DSM or a DTM. In windPRO we use the following abbriations when dealing with DEM's.

DEM Digital Elevation Model Is often used as a generic term for both DSM's and DTM's.
DSM Digital Surface Model Surface representation with objects
DTM Digital Terrain Model Bare earth representation without objects.

Pages in category "Digital Elevation Models"

The following 59 pages are in this category, out of 59 total.

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