ABSTRACT
Currently, the GPS/GIS integrated system has been widely used in the transportation system, military, civilian, etc. The global positioning system (GPS) is a high technology to achieve global position and navigation, which has the virtues of globality, all-weather, rapid-positioning, high-accuracy, providing continuous information of real-time three dimensional position, three-dimensional velocity and time[1]. The geographic information system (GIS) is a spatial information system. Based on the GIS database and GNSS information, many applications can be realized [2].
