Establishment of Map Update Technique for Local Government by using GPS, GIS and Remote Sensing

Much local government has been utilizing a large-scale digital map using GIS. However, the updating method of a map has not been established yet. The purpose of the study is to establish a method of updating the large-scale map for local government using Real-Time GIS. The Real-Time GIS is a technique for updating a digital map instantly using RTK-GPS and mobile phones. GPS is extremely precise and new geodetic system. However, most of the digital maps of local government are still old geodetic system. To match two kinds of data having different geodetic systems, it is necessary to transform coordinates. This study used TKY2JGD and Affine Transformation. As a result, parameters using TKY2JGD could not be applied to a large-scale map. Affine Transformation had only 3 cm errors. The paper suggested that Real Time GIS and Affine Transformation will help to revise the map of local government.