高山峡谷区大比例尺地形图快速制作方法

Rapid Production Method of Large-scale Topographic Map in Alpine Valley Areas

无人机低空遥感数字航空摄影测量系统已经成为获取地形数字成果的重要手段之一,但在高山峡谷等地形高差大的区域,采用常规无人机立体航测方式不仅难以获取测区高分辨率影像以满足大比例尺成图需求,且效率较低。本文总结了一套基于无人机航测的高山峡谷区大比例尺地形图快速制作方法,并以西南某测区为例,验证了该方法的可行性,且利用野外实测数据对地形图成果精度进行验证,完全满足1∶500地形成图精度要求,对实际测绘生产具有重要借鉴意义。

The UAV low-altitude remote sensing digital aerial photogrammetry system has become one of the important means to obtain the digital results of topographic surveys.However,in high mountain valleys and areas with large terrain elevation differences,it is not only difficult to obtain high-resolution images using conventional UAV stereo aerial survey methods to meet the needs of large-scale mapping,and the efficiency is low.This article summarizes a set of rapid production methods for large-scale topographic mapping of high mountains and valleys based on UAV aerial surveys.Based on a test area in Southwest China as an example,the feasibility of this method is verified,and the accuracy of topographic map results is verified by field survey data,which fully meets the accuracy requirements of 1∶500 topographic map,which can be used for reference in actual surveying and mapping production.