THE REASEARCH OF THE 3S TECHNOLOGY APPLICATION IN THE LARGE SCALE LAND UTILIZATION MAP UPDATING

摘要

The paper gives the following results of our study in the filed of the 3S technology application in the large scale land utilization map updating. ①The compound technology of graphics and images bases on the digital line graphic of land use. ② We take the polygon boundaries of land use line graphic as polygon boundaries of compound maps, then construct the automatic identify technology of compound alias polygons; ③By using the methods of GPS single point repeated positioning-averaging, and continuously positioning-moving averaging, we gather the boundary data of compound maps (the updating contents of land use map) and analyze the date precision; ④We construct the updating layers bases on the spatial benchmark of local database of land use. At the same time, we put forward the conception of compound alias polygons to describe the study objects more clearly.