Hans-Gerd Maas is professor for Photogrammetry at TU Dresden, Germany. Photogrammetry means extracting precise and reliable 3D information from image data: We use image analysis techniques for the automation of image measurement tasks, combined with strict geometric and stochastic modelling for optimizing solutions. Our main research focus is on the integration of sensors (both cameras and lidar) and processing algorithms for the development of efficient solutions for demanding measuring tasks.