A photogrammetric image processing apparatus and method defining a plurality of pairs of images including a common target as belonging to the same groups (pairs), providing an image display area and drawing area on the screen of the display device, calculating valid mapping ranges for the pairs 1 to...http://www.google.ca/patents/US6618497?utm_source=gb-gplus-sharePatent US6618497 - Photogrammetric image processing apparatus and method