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Digital terrain models (DTMs) today are a major componentof geographie information Systems (GIS). They support theanalysis and display of phenomena related to the topographyof the earth's surface. Thus, DTMs are mainly used in the environmental sciences and in natural resources management,as well as in engineering and planning applications. This article intends to present an introduction and overviewof the techniques of digital terrain modeling and their applicationin GIS. DTM processing is regarded as a sub-system ofa GIS, with a range of functions similar to that ofthe main System, yet utilizing specific tools (i. e. algonthms and data structures) tailored to the particular requirements of surface models. Following a brief review of the components of a DTM System some examples of applications of DTMs will be presented.The article is concluded with a discussion of major directions for future research

Verarbeitung und Anwendung digitaler Geländemodelle im Bereich der Geographie