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Orthorectification of stereo SPOT pancharomatic and RADARSAT Fine Mode data using orbital parameter and digital elevation model

Seeni Mohd., Mohd. Ibrahim and Ahmad, Shahruddin (2001) Orthorectification of stereo SPOT pancharomatic and RADARSAT Fine Mode data using orbital parameter and digital elevation model. Malaysian Journal of Remote Sensing & GIS, 2 . pp. 19-24. ISSN 1511-7049

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Abstract

Rectification of satellite data using ground control points (GCPs) in a polynomial fit is not practical in areas with limited well-defined GCPs. This is the case in many forested areas or in coastal areas. This study evaluated on the rectification accuracy of SPOT Panchromatic and Radarsat Fine Mode data using satellite orbital parameters. The research revealed that the optimum number of GCPs for rectification was 8 for SPOT Panchromatic and 10 for Radarsat Fine Mode giving respectively RMSE accuracy of 0..34 and and 1.04. This research also studied on the accuracy of producing orthoimages from Digital Elevation Models (DEMs), derived from stereo SPOT Panchromatic and Radarsat Standard Mode datasets. The DEMs accuracies were validated using more than 100 spot heights derived from digitized contour map. The DEM accuracies achieved for stereo SPOT data was 26.3 m and stereo Radarsat data was 35.2 m. The resultant orthoimages of SPOT Panchromatic and Radarsat Standard Mode data generated from the DEMs were evaluated for x-y accuracy by merging with digital vector data of 1:25000 scale using 20 reference test points. The SPOT and Radarsat gave respectively 4.76m and 6.82m mismatch.

Item Type:Article
Uncontrolled Keywords:Orthorectification; SPOT; RADARSAT; digital elevation model
Subjects:T Technology > T Technology (General)
Divisions:Geoinformation Science And Engineering (Formerly known)
ID Code:1853
Deposited By: Mr Wan Hazli Wan Kadir
Deposited On:15 Mar 2007 08:25
Last Modified:24 Dec 2010 05:29

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