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technical information on SPOT DEM

Download the SPOT DEM product information




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For a very realistic representation of ground relief, mountains or other terrain characteristics, SPOT DEM can be overlaid with a SPOTView Plus Ortho of the same area, which adds 3D perspective



Elevation30 DEM(SPOT DEM)

 

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Add a new dimension to your geographic data bases
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A SPOT DEM is a digital elevation model produced by automatic correlation of stereopairs acquired by the HRS instrument on SPOT 5.

Unlike a digital terrain model (DTM), which describes the distribution of terrain or “bare earth” heights, a DEM includes “first surface” elevations including vegetation and man-made structures.

Sampling
- A SPOT DEM is a gridded file with step sizes of 1 second of arc (30 m on the equator, E/W dimensions vary according to the latitude).
Resampling to 20 m available.

 
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Unmatched performance
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Absolute horizontal accuracy without ground control points
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The absolute horizontal accuracy is the positional error in the DEM with respect to the ground truth. For a SPOT DEM, this depends on the dimensions of the area of interest or on the availability of Reference3D (French defence database) data for this area.
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Absolute vertical accuracy without ground control points
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The absolute vertical accuracy is the elevation error in the DEM with respect to the ground truth. It depends mainly on the slope of the terrain.

 
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A made-to-measure response
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Datum and projection
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  • WGS84
  • UTM WGS84 or other projection on request
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Size / Frame
- The SPOT DEMs can be framed to match the perimeters of your area of interest. With a price per square kilometre, you will be able to optimize your budget.
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Format
The SPOT DEM come in the Dimap format (or DTED as an option).

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They chose SPOT DEM
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European Commission (JRC), French defence ministry, United Nations, NGA, Total ...
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