Overall Comments on Application of Photographic Surveying and Remote Sensing in Chinese Railway Construction

Research purposes: In combination with the development and present situation of photographic surveying and remote sensing,the overall comments are made on the application of the technologies of photographic surveying and(remote) sensing in all aspects of railway construction,and also the analysis is made for the concrete situations and their applicable potentiality of rapid raising technologies of radar interfering surveying,high-resolution satellite remote(sensing) and high-spectrum remote sensing. Research conclusions:There are three development trends for photographic surveying and remote sensing being applied in Chinese railway construction.The first one is there will be three new breakthroughs in the aspects of space(resolution),spectrum resolution and time resolution,through which the remote sensing network with low-resolution,medium-(resolution) and high-resolution being relatively complemented each other will be formed in combination with high orbit,medium orbit and low orbit,with the aid of large-sized,medium-sized and small-sized satellites.The second one is photographic surveying and remote sensing along with "3G" technology will be applied widely in Chinese railway(construction).The third one is the railway management information service system will be formed by adopting remote sensing technology along with virtual and realistic techniques.In this way, the system can serve the public vividly and easily with computer.