Use Of Space Remote Sensing Image To Update The 1:250,000 Topographic Map Databases

1:250000 terrain map Data-Base is the important achievement of the martial mapping project in the Ninth Five Period and it make important role in the campaign training. But most of it's data is collected in the eighty-decade, it is too old for the practical use today.The paper discuss the essential and the possibility of the using the space remote sensing imagery refresh the 1:250000 terrain map Data-Base. It study carefully the distortion of the remote sensing imagery, the rectification of the radiant quantity, the RS image strengthen and the color fusion. Based on these achievements above, we do experiment on the differential rectification, the RS image fusion, the object determining and the exchange for the different format data, propose the plan and flow chart of the terrain map rectification by the RS imagery. We demonstrate the method for the target location and the direction outside by the RS imagery and how to select the reference point and read the information of the RS imagery.