A method and system for producing digital orthophotos from imagery acquired as full or sparse stereo. The orthophotos can be produced in a variety of map coordinate systems without the need to convert or recompute DEM or photogrammetric solution data. In one embodiment, a two dimensional, planimetric...http://www.google.de/patents/US6757445?utm_source=gb-gplus-sharePatent US6757445 - Method and apparatus for producing digital orthophotos using sparse stereo configurations and external models
