Abstract: The method how to generate virtual image with integration based on field of outer view are discussed.The experimental results show that elevation precision achieves leading level in similar product and the plane precision achieves advanced level.Through the results verification of mapping precision to the test block of Beijing,topographic which is mapped using SWDC4 images under 1∶500,1∶1 000,1∶2 000,1∶5 000 scale satisfies the precision request and is superior to the limitation of specifications of surveys.