EARSeL Joint Workshop Remote Sensing, New Challenges of High Resolution, Bochum 2008 1 GEOMETRIC CHARACTERISTIC OF DIGITAL FRAME CAMERAS

In this contribution the geometric characteristics of a digital photogrammetric aerial camera are discussed for the generation of digital elevation models (DEM) and stereo plotting. Due to legal restrictions the German hard coal mining company RAG Aktiengesellschaft (RAG), successor of the Deutsche Steinkohle AG, is obliged to conduct a monitoring on earth surface changes caused by mining activity. To fulfil legal demands in effective manner process chains using photogrammetry, remote sensing and Geo Information Systems (GIS) have been established. Photogrammetric methods are used to generate high resolution DEMs from which- in combination with subsidence information- geometric changes to the topographic surface are deduced. For mine site areas from about 100 km up to 200 km DEMs have to be generated by means of digital photogrammetric stereo-workstations with a standard deviation of ±10cm for the height. This accuracy up to now could be attained with analogue wide angle cameras at an image scale of 1:4000 and 80 % end lap together with a high number of ground control points. In March 2006 an aerial flight campaign had been performed with the Microsof