Evaluation on the accuracy of digital elevation models

Auteurs :
TANG GUO-AN,
STROBL, J.
GONG JIAN-YA,
ZHAO MU-DAN,
CHEN ZHEN-JIANG,

Description :
There is a growing interest in investigating the accuracy of digital elevation model (DEM). However people usually emphasize DEM sampling errors, but ignore the impact of DEM resolution and terrain roughness on the accuracy of terrain representation. This research puts forward the concept of DEM terrain representation error (Et). A multi-resolution and multi-relief comparative approach is used as the major methodology in this research. The experiment reveals a quantitative relationship between the error and the variation of resolution and terrain roughness at a global level. Root mean square error (RMS Et) is regressed against surface profile curvature (V) and DEM resolution (R) at 10 resolution levels.


Type de document :
Article de périodique

Source :
Journal of geographical sciences. Acta geographica sinica, issn : 1009-637X, 2001, vol. 11, n°. 2, p. 209-216, Collation : Illustration, Références bibliographiques : 17 ref.

Date :
2001

Editeur :
Pays édition : Chine