Abstract:A digital elevation model (DEM) can be created using a variety of interpolation or approximation methods, any of which may yield errors in the final result. We present DEMEV (DEM Error Viewer), a visualization system that displays a DEM and possible errors in 3D, along with its associated contour or sparse data and/or a comparison DEM. The system incorporates several error visualizations. One method compares the test DEM to source data and highlights discrepancies (difference error) beyond a user-variable thre… Show more
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