In this process,the geocoding image mosaic needs rectification depending on the geodetic datum because of difference of the earth models and map projections used in the image mosaic.

• 由于两幅图像在地理编码中采用的地图投影方式和地球模型不同,所以在拼接处理时,需要在同一坐标系下通过地学基准转换参数进行修正。