@unpublished{TUW-119944, author = {Rottensteiner, Franz and Kager, Helmut and Briese, Christian and Kraus, Karl}, title = {LIDAR Activities at the Viennese Institute of Photogrammetry and Remote Sensing}, year = {2002}, note = {invited; talk: 3rd International LIDAR Workshop, ''Mapping Geo-Surficial Processes Using Laser Altimetry'', Ohio State University, Columbus; 2002-10-07 -- 2002-10-09} }