Close Range Sensing Techniques in Alpine Terrain The Series IGF Forschungsberichte / IGF Research Reports aims to present findings of ongoing or recently cornpleted research projects ar the IGF which could not be accommodated wirhin the space of an article for a scientific journal. It thus provides a comprehensive picture, freeing readers from the necessity of looking for individual contributions in different journals. The series also documents proceedings of conferences. An inrerested public will thus find all contributions to a conference therne collected in one volume and will need not to search for them one by one across many different publication series.