Using of Geographical Information System and Global Positioning System to Establish Coordinate System for the Remote Sensing Data

Abstract

ABSTRACTA GPS measurement is developed for the purpose of establishing ground control points (GCP's) for rectifying medium and high resolution satellite imageries. These GCP's could be also used as a data overlays on the GIS maps. The acquired data (such as aerial photography and satellite imagery) from the remote sensing techniques can be correlated with GPS allowing the measurement locations to be shown on a GIS map, then the data can be analyzed geographically. This paper presents a procedures to establish a geographical coordinate system for the acquired remote sensing data (aerial photography) from the topographic map's coordinate (scale of 1:100000) covered the same study area by using GPS techniques and GIS software. The rectify process was applied with the Clarke1880 reference ellipsoid that have been adopted for the selected study area in Mosul city. The results show, best agreement between the establish coordinate of the aerial photography and the coordinate of topographic map of the same study area. Also, the accuracy of the final results depend on the accuracy of the GPS receiver readout.