Abstract Research purposes: As a new aerial survey technique，the airborne LIDAR technology has been widely researched and applied in many industries at home and abroad．However，a mature applied mode has not yet formed in vsrious industries，including railway survey at present．So it is necessary to do deeper research on application of this new technology in railway survey and timely sort the key problems in application found in the research for promoting the development and application of this new technology．
Research conclusions: Several key issues of airborne LIDAR applied in railway survey are analyzed．Applications of airborne LIDAR in railway survey are conscientiously summed up，the parameters of airborne laser sensor in the condition of China's terrain condition are determined．And fully combined with specific projects，method and standard of point cloud classification for railway survey is mastered，accuracy authentication of airborne LIDAR result can be done through the authentication method of result precision of airborne LIDAR mentioned in the paper，observational result of airborne LIDAR based on UTM system through protection into engineering coordinate to get the geographical information system Can meet the requirement of railway survey and design before the project application．
IAu Jingnan，Zhang Xiaohong，Li Zhenghang．Analysis of Systematic Error Influencing the Accuracy of Airborne Laser Scanning Altimetry[J]．Geomatics and Information Science of Wuhan University。2003(4)：111— 117．
2010, Vol. 27 
