Abstract
The Very High Resolution (VHR) satellite imageries such us Pleiades, WorldView-2, GeoEye-1 used for precise mapping purpose must be corrected from any distortion to achieve the expected accuracy. Orthorectification is performed to eliminate geometric errors of the VHR satellite imageries. Orthorectification requires main input data such as Digital Elevation Model (DEM) and Ground Control Point (GCP). The VHR systematic-ortho imageries were generated using SRTM 30m DEM without using any GCP data. The accuracy value differences of VHR systematic-ortho imageries and VHR orthorectified imageries using GCP currently is not exactly defined. This study aimed to identified the accuracy comparison of VHR systematic-ortho imageries against orthorectified imageries using GCP. Orthorectified imageries using GCP created by using Rigorous model. Accuracy evaluation is calculated by using several independent check points.
Highlights
The use of very high resolution satellite imageries for largescale mapping (1: 5000) provides many advantages over the use of aerial photography related to costs and area coverage
The very high resolution (VHR) systematic-ortho imageries is refers to satellite imageries which semi-automatically ortho-rectified by using Digital Elevation Model (DEM) data only without using any Ground control Point (GCP) data
The horizontal accuracy of orthorectified image evaluated based on Root Mean Square Error (RMSE) error value
Summary
The use of very high resolution satellite imageries for largescale mapping (1: 5000) provides many advantages over the use of aerial photography related to costs and area coverage. In Indonesia, the usage of systematic (semiautomatic) orthorectification is increasing due to its costeffective and its simple-rapid method of ortho imageries for many practical purposes for national development, such as infrastructure developments and regional development planning. It is necessary examine the benefits value of the systematic-ortho method compared to its accuracy result. This paper discuss comparison of the accuracy of very high resolution (VHR) systematic-ortho imageries against orthorectified imageries using GCP data in tropical region. The VHR systematic-ortho imageries is refers to satellite imageries which semi-automatically ortho-rectified by using DEM data only without using any GCP data. The orthorectified imageries is rectified by using Terrasar-X DEM and GCP
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