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 t errain models (DTM) and orthophotography. Computer simulation using a modified bundle software fosters versatility and high accuracy in term s 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 wi th regard to precision for various tilt angles, number of GCPs, variou s positions of control points in different patterns, etc.