Stefan Rasemann, B 1 Geomorphographic structure - semantics, parameters, application Due to the influence of global change on permafrost patterns in high alpine environments, an understanding of periglacial geomorphic systemsis required. This can be achieved through the analysis of spatio-temporal patterns of permafrost forms. In detection of geomorphic objects related to permafrost geomorphometry is a valuable tool. To apply recent geomorphometric techniques to permafrost environments consistent semantic description of permafrost environments is necessary. It is a purpose of this study to develop a multiscale semantic model for high alpine permafrost environments, by applying and developping geomorphometric analysis techniques on different spatial scales in the Turtmanntal, Valais, Switzerland.
Emphasis is put on the structural relationships between landform elements.
The findings and morphometric techniques will be useful for a better understanding of process-form relationships in high alpine permafrost environments. The earth's surface can be subdivided into homogenous sections by geomorphographical approaches. The primary objective of this project is to create self-controlled segmentation software which will be applied to aerial views. For this purpose several procedures of digital image processing are implemented. At first significant image features will be extracted.