Technology and Methodology |
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GEOMETRIC CORRECTION METHODS OF SPOT5 1A DATA BASED
ON GPS-MEASURED GROUND CONTROL POINTS |
CHEN Hua, AN Na, YANG Qing-Hua |
China Aero Geophysical Survey and Remote Sensing Center for Land and Resources, Beijing 100083, China |
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Abstract Using the high resolution ground control points measured by satellite-based DGPS (Differential Global
Positioning System), this paper compared two geometric correction methods for SPOT5 data and analyzed the causes
of correction errors. The results show that the accuracy of the orthorectification model method is better than
that of the polynomial method. The errors of the polynomial method in Y axis are bigger than those in X axis, but
the error difference in Y axis and in X axis is not obvious for the orthorectification model method. The pixel
distortion caused by the satellite observation angle is the main cause for the bigger errors of the polynomial
method.
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Keywords
Remote senisng information
Vegetation
Biogeochemistry
Gold prospect areas
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Issue Date: 23 July 2009
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