基于数据融合技术的无人机航测成图模式探索

Exploration of UAV aerial graphical survey modebased on data fusion technology

针对山区大面积复杂地形测量困难的问题,本文提出一种集无人机航空摄影测量、机载激光雷达扫描、三维模型立体测图等多种技术于一体的测量模式,以外业采集海量数据、内业立体测图的方法代替传统全野外数字测图。该方法在抽水蓄能电站地形测量工作中得到验证,具有相对成本低、时效高等突出优势。经实测数据检验,地形图平面和高程精度均优于30cm,符合现行地形图测量规范要求,同时还可以提供正射影像图、数字高程模型、数字表面模型、数字线划图等多种测绘地理信息产品,能够满足工程设计、施工的多项需求。所探索的测量模式,值得推广借鉴。

This article proposes a measurement mode that integrates various technologies such as unmanned aerial vehicle aerial photogrammetry,airborne LiDAR scanning,and 3D model stereo mapping to address the difficulty of surveying large and complex terrain in mountainous areas.The method of collecting massive amounts of data in the field and conducting indoor stereo mapping replaces traditional full field digital mapping.This method has been validated in the topographic survey work of pumped storage power stations,and has outstanding advantages of relatively low cost and high timeliness.After testing with measured data,the accuracy of both the plane and elevation of the topographic map is better than 30cm,which meets the current surveying standards for topographic maps.At the same time,it can also provide various surveying and mapping geographic information products such as orthophoto maps,digital elevation models,digital surface models,and digital line plots,which can meet multiple needs of engineering design and construction.The measurement mode explored is worth promoting and learning from.