The Research And Application Of LiDAR Technology In The Highway Survey Of Xinjiang

The Highway Survey and Design is gradual deepening of the process of improvement,a relatively long period, especially in high-grade highways, from the initial to the final program planning construction design generally have more than a few years, each stage requires a different accuracy levels and different scales survey results. In the preliminary design stage main need conventional topographic products, and in the construction design stage, you will need high-precision topography data. Therefore, how to quickly obtain high-precision, mass information topography data that is one of the main bottlenecks for highwaysurvey and design.Achieve a measurement data in Highway Survey and the full application of the various stagesin order to reduce the workload outside, improve work efficiency and improve the accuracy of theresults and methods of operation technology, which has been the relentless pursuit of highwayengineering survey objectives. Subsequently, the emergence of digital photography measurementmethod, to a certain extent, to make the project work efficiency is greatly improved measurement,engineering surveying a large area quickly became the preferred method; Meanwhile, GPSassisted photogrammetry outside the industry, but also greatly reduces the workload of the controlmeasure, is widely used in engineering units. But by human factors and climate, digitalphotogrammetry widespread labor-intensive, long cycle, processes and other shortcomings,through stereo pair matching the generated DTM/DSM accuracy than the use of analyticalmapping system to obtain similar products accuracy is low, when a photo texture and contrast isweak, the accuracy will drop shadow effects, and can not fundamentally solve the highwaycorridor vegetation cover band problems in engineering survey and design of the applicationsubject to certain restrictions.At present, Light Detection And Ranging(LiDAR) as the representative of earth observationfrom space technology access to information in three-dimensional space has made a major breakthrough in order to obtain high spatial and temporal resolution geospatial informationprovides a new technical means. Airborne laser radar technology is the basis for the ideal terraindata acquisition means, the extensive application of this technology can effectively guarantee thequality and duration of survey and design, reduce resource inputs and emissions, substantialenergy savings, promote technological progress road survey and design, its application prospectswide, can be used in road construction and management throughout all stages of the service athighway modernization.