Topographical terrain models are generated by digitally delineating the boundary of the region under investigation from data obtained from an airborne synthetic aperture radar image and surface elevation data concurrently acquired either from an airborne instrument or at ground level. A set of coregistered...http://www.google.de/patents/US5053778?utm_source=gb-gplus-sharePatent US5053778 - Generation of topographic terrain models utilizing synthetic aperture radar and surface level data
