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Geometric correction accuracy of IRS-1D PAN imagery using topographic map versus GPS control points

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Abstract:

Geometric correction accuracy of IRS-1D panchromatic imagery was investigated using GPS- and 1 : 25 000 scale topographic map-derived control points. The differentially corrected GPS-derived coordinates provided markedly more accurate results than did uncorrected handheld GPS- and map-derived GCPs. The rms error value of differentially corrected GPS-derived control points based on second-degree polynomial was in the order of ±3 m. Geometric corrections made with second-degree polynomials, using both the map- and uncorrected handheld GPS-derived control points, yielded rms error values in the order of ±5 m. The results revealed that the uncorrected handheld GPS-derived control points can be a valuable alternative to planimetric control for geometric correction of IRS-1C/D panchromatic imagery with one-pixel size accuracy.

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/0143116031000150086

Affiliations: Middle East Technical University, Graduate School of Natural and Applied Sciences Geodetic and Geographic Information Technologies 06531 Ankara Turkey, Email: mturker@metu.edu.tr

Publication date: March 1, 2004

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