On the quantification of surface changes using grid-based digital elevation models (DEMs)

  • Etzelmuller B
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This paper discusses the quantification of vertical surface displacements by means of grid-based digital elevation models ({DEMs}). The surface changes are quantified by comparing altitude and different topographic parameters, which have a geomorphic significance with respect to surface changes. This paper describes the choice of different spatial calculation techniques, considering {DEM} accuracy and the propagation of error for the different topographic parameters involved. The techniques are illustrated on two grid-based {DEMs} from Finsterwalderbreen, a 35 km2 sized valley glacier on south-western Spitzbergen, Norwegian High Arctic.

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  • B. Etzelmuller

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