基于倾斜摄影测量技术在大比例尺地形图测绘中的研究

Research on Surveying and Mapping of Large-scale Topographic Maps Based on Inclined Photogrammetry

倾斜摄影测量技术作为国际测绘领域最近几年来新兴的一种测绘新技术,目前在三维建模和工程测量中得到了很好的应用。传统的摄影测量技术主要对象为地形、地物顶部;地面起伏、地物侧面纹理和三维结构等属性获取有限;此外目前大比例尺地形图测绘方法在成图效率与成本之间有一定的矛盾。文章阐述了基于无人机倾斜摄影测量在大比例尺地形图测绘中的绘图流程、线划图数据采集,利用无人机倾斜摄影测量技术的优点简化后续绘图工作。根据恭城县得到的大比例尺地形图成果,平面精度达到:0.209 m,高程精度达到:0.197 m,符合大比例尺地形图精度要求,精度完全可以达到同等比例尺外业数字测量的精度要求。

Tilting photogrammetry technology is a new mapping technology emerging in the field of international surveying and mapping in recent years, and it has been well applied in three-dimensional modeling and engineering measurement. The main objects of traditional photogrammetry technology are the topography of terrain and the top of the ground; the properties of ground relief, side textures, and three-dimensional structures are limited; in addition, mapping methods for large-scale topographic maps have certain contradictions between mapping efficiency and cost. This paper expounds the drawing flow and line chart data acquisition based on the UAV tilted photogrammetry in large-scale topographic map mapping, and uses the advantage of UAV tilted photogrammetry to simplify the subsequent drawing work. According to the large-scale topographic map obtained by Gongcheng County, the plane accuracy is 0.209 m and the elevation accuracy is： 0.197 m. It meets the accuracy requirements of large-scale topographic maps, and the accuracy can exactly meet the accuracy requirement of digital measurement in the same scale.