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| ATDI / SRTM. The revolution in medium resolution cartography |
SRTM, Shuttle Radar Topography Mission
SRTM is an international project spearheaded by the
National Geospatial-Intelligence Agency (NGA) and the
National Aeronautics and Space Administration (NASA).
The Shuttle Radar Topography Mission (SRTM) obtained
1 arc second accurate data to generate an almost complete
digital topographic database of Earth at 3 arc seconds
resolution. The post-processing done by ATDI generates
90m (and even 50m) DTMs, fitting the following needs
in terms of cartography :
- Large areas covered (Regional, national and international scale)
- Reduced cost and delivery times
- The technical specifications are homogeneous and clearly defined over the Area Of Interest
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High and Homogeneous Quality Datas |
By using a unique acquisition mode all over the Earth, a single technical specification can be defined.
- Absolute vertical accuracy : 16 m
- Relative vertical accuracy : 10 m
- Absolute planimetric accuracy : 60 m
- Relative planimetric accuracy : 45 m
- Sampling : 3 arc seconds
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| Low cost / High quality |
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The post-processing handled by ATDI (ICS Map Server software) is therefore time effective :
- Tiling and geoconversion
- Local treatment over coastal areas
Technical specifications of the ATDI/SRTM product :
- Planimetric resolution : 90 m interpolable up to 50 m.
- Altimetric resolution : 16 m.
- Projection over a metric grid
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