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- Pleiades-1B (0.5m)
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Digital Elevation Models
Satellite Imaging Corporation (SIC) provides orthorectified stereo satellite imagery which can be processed for visualization of terrain conditions in 3 Dimensions (3D) or a Digital Elevation Model (DEM) which are generated from a variety of resources.
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About Digital Elevation Models (DEM's)
Satellite Imaging Corporation (SIC) can provide customers with <1m - 5m DSM's, DEM's, and a detailed, orthorectified satellite image mosaic at <1m resolution to project planners, operation managers, and logistics managers to plan field operations in a computer environment, ensuring that the best access is provided and project objectives are achieved.
In addition to the orthorectification of satellite image data, the DEM's are utilized in support of the pre-planning and lay-out of corridor surveys, area developments, seismic line locations, well sites and engineering, construction activities, environmental and geological.
Bingham Canyon Copper Mine, Utah, USA
Pleiades-1 (1m) Digital Elevation Model (DEM)
(Copyright © AIRBUS DEFENCE & SPACE and processed by Satellite Imaging Corporation)
There is a variety of DEM source data available for developed areas and the suitability of this available data is depending on the project specifications. In remote regions around the World, were little or no source data is available, the DEM can be produced by automatic DEM extraction from stereo satellite imagery, from satellite sensors such, , , , and satellite sensors.
Quality DEM products are measured by how accurate the elevation is at each pixel and how accurately the morphology is presented. Several factors are important for quality of DEM-derived products:
- Terrain roughness
- Sampling density (elevation data collection method)
- Grid resolution or pixel size
- Interpolation algorithm
- Vertical resolution
- Terrain analysis algorithm
Common uses of DEM's include:
- Extracting terrain parameters
- Volume Calculations
- Modeling water flow or mass movement (for example, landslides)
- Creation of relief maps
- Rendering of 3D visualizations
- Creation of physical models (including raised-relief maps)
- Reduction (terrain correction) of gravity measurements
- Terrain analysis in geomorphology and physical geography
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