无人机航测倾斜摄影测量三维地理信息建模分析

为了便于三维地理信息的建模，采用无人机航测倾斜摄影测量技术，提出了一套用于无人机倾斜摄影的三维地理信息建模方案，分析了Mesh模型三角网图的构建方法，通过纹理映射技术实现三维模型的着色，研究了实地测量及三维模型精度，并利用多视影像技术对影像数据的纹理布设实施优化，研究得出。研究所设计的最大高程中误差为0.074 647 m，最大平面中误差为0.130 m，符合《三维地理信息模型数据产品规范》中Ⅰ级1∶500成图比例尺三维模型产品规定。

Modeling and analysis of 3D geographic information in UAV aerial photogrammetry

In order to facilitate the modeling of 3D geographic information，this paper adopted drone aerial survey tilt photogrammetry technology，and proposed a set of 3D geographic information modeling schemes for drone tilt photography.The texture mapping technology realizes the coloring of the 3D model，studies the field measurement and the accuracy of the 3D model，and uses the multi-view imaging technology to optimize the texture layout of the image data.The maximum error in elevation designed by the research institute is 0.074 647 m，and the maximum error in plane is 0.130 m，which is in line with the regulations of Class Ⅰ1∶500 drawing scale 3D model products in the "3D Geographic Information Model Data Product Specification".