DTM - Digital Terrain Model

Derivations from DTM

For the most applications (see below) the pure altitude data of a DTM is not sufficient. Therefore exists many algorithm to compute wide varity of derivations from DTM:

• calculation of local morphometric values for each grid cell of the DTM, such as slope angle, slope aspect and curvature, etc.
• calculation of complex morphometric values for each grid cell of the DTM, such as: square measures of drainage basins, distances to flow lines and watersheds, etc.
• derivation of morphographic features: linear features, such as crest lines, flow lines and edges; areal features, such as valley grounds, summit areas, subdividing of slopes, etc.
• visualization of the relief: computing contour lines, analytic hillshading and 3dimensional views

© 1999 TRIANET, Program of the European Union Socrates-Comenius
Last update on 05.05.1999 by Markus Zapke-Gründemann