三维激光扫描技术在水利工程坝址地形图测绘中的应用

针对木林岩水库工程深山峡谷坝址区地形条件复杂、地形变化剧烈、布设控制点难度高、外业作业量大及成果获取时间长等问题,根据坝址地形条件及地形图测绘要求,经现场踏勘结合三维激光扫描仪技术优势,提出三维激光扫描+GPS RTK和全站仪对工程隐蔽区域进行补充测量,以获取测区完整测量数据的解决方案。应用成果表明:三维激光扫描技术在不接触实物的情况下对隐蔽区进行测量,测绘工作效率高、野外数据采集强度大大降低,同时其测绘成果精度能够满足测量规范限差要求,能保障测绘数据的实效性、准确性和全面性。

The Application of 3D Laser Scanning Technology in Water Conservancy Engineering Topographic Mapping

The technical problems in topographic survey at deep canyons dam site area of Mulinyan reservoir are introduced,including complicated terrain conditions, violently change terrain,high difficulty for layout control point, big quantity field operation works and long time for results acquisition. According to the topographic conditions and mapping requirements of topographic in dam site, based on the site reconnaissance,the advantages of 3D laser scanner technology, the solution programmers with additional survey by 3D laser scanning+GPS RTK and total station for hidden region to obtain the complete measured data in mapping area has been done. The application results show that:the 3D laser scanning technology can map the hidden region in no-touch situation, which not only has high surveying and mapping work efficiency, and the strengthen of field operation data collection has been greatly reduced, but also the precision of surveying and mapping results can accord with the measurement specification limit request. The 3D laser scanning technology can guarantee the surveying and mapping data with high effectiveness, accurate and comprehensive.