无人机低空摄影在大比例尺地形测图中的应用研究

Research on Application of UAV Low-altitude Photogrammetry in Large Scale Topographic Mapping

无人机低空摄影测量技术具有机动灵活、快速高效、精细准确、作业成本低、适用范围广等特点,在小区域和人工测量困难地区可快速获取高分辨率影像。本文基于某海港的陆域地形测量项目,对无人机低空摄影测量技术的基本流程以及关键技术进行了系统的介绍,并对其精度进行分析。经与野外实测点对比,精度可达到10 cm以内,满足1:500地形测图规范要求。本文可为基于无人机低空摄影测量的大比例尺地形测图提供一定的参考借鉴。

UAV low-altitude photogrammetry is characterized with flexibility, high speed & efficiency, accuracy,low cost and high applicability. The above technique can be used to quickly acquire high-resolution images in a small district or the area where it is difficult to carry out manual survey. Based on the landside topographic survey of a harbor, the basic process and key techniques of UAV low-altitude photogrammetry are systematically expounded, and its accuracy is analyzed. In comparison with real-measured points, the accuracy is kept within the range of 10 cm, which satisfies the specification requirements for the topographic maps in the scale of 1: 500. The research results will provide a certain reference for the large scale topographic mapping based on UAV low-altitude photogrammetry.