| Summary: | 碩士 === 國防大學中正理工學院 === 軍事工程研究所 === 90 === ABSTRACT
The positioning precision should be taken care when map-making with SPOT satellite imagery. One of good methods is solving the exterior parameters by using mounts of ground control points（GCPs）. The method spends time and money, and not suitable to the area that GCPs are hard to get.
The research proofs, use SPOT satellite orbital and ephemeris data combining suitable geometric constraint condition with some GCPs, the sub-pixel positioning precision can be achievable. The positioning precision of X,Y,Z axis is 5.557m,6.671m,9.560m separately. The model works well even when the number of GCPs is few. And the result is better than Intersection Method of no GCPs.
Using 10 equal-height condition groups with 3 GCPs, the positioning precision of X,Y,Z axis will be promoted to 177.995m,47.998m and 147.715m. When the GCPs are 6, the result will be promoted to 91.612m,58.555m and 115.031m.
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