Digital elevation models (DEMs) are increasingly used for visual and mathematical analysis of topography,
landscapes and landforms, as well as modeling of surface processes. A DEM of Cerro Sillajhuay, a volcano in
the Andes of Chile/Bolivia, was developed from ASTER (Advanced Spaceborne Thermal Emission and
Reflection Radiometer) satellite data. The original 30-m DEM was generated by using tie points, and was finally
re-sampled to 15 m to exploit full ortho-image resolution. Five geomorphic parameters, which are useful to
identify and describe geomorphologic forms and processes, were extracted using the software ArcInfo and
ArcView: elevation, aspect, slope angle, vertical curvature, and tangential curvature.
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GIS Weekly Magazine
Susan Smith
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Look for the next issue of GIS Weekly Magazine on May 28, 2012.
Each GISWeekly Review delivers to its readers news concerning the latest developments in the GIS industry, along with a selection of other articles that we feel you might find interesting. |
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