A MODIFIED BUNDLE ADJUSTMENT SOFTWARE FOR SPOT IMAGERY AND PHOTOGRAPHY - TRADEOFF

A major problem for SPOT imagery is its geometric accuracy in relation to aerial photography, especially from the point of view of digital terrain models (DTM) and orthophotography. Computer simulation using a modified bundle software fosters versatility and high accuracy in terms of mirror tilt angles, distribution of ground control points (GCP), etc., and is a feasible and cost-effective analytical tool. This paper presents a tradeoff study of a modified bundle adjustment program for the simulation of SPOT geometry vis-a-vis conventional photography with regard to precision for various tilt angles, number of GCPs, various positions of control points in different patterns, etc.