基于高分七号立体影像的西部困难地区测图精度评价  

Accuracy evaluation of mapping in difficult areas in western China based on Gaofen-7 stereoscopic images

作　　者：高小龙 张生彤 GAO Xiaolong;ZHANG Shengtong(Mapping Institutiion of Gansu province,Lanzhou,Gansu 730000,China)

机构地区：[1]甘肃省地图院,甘肃兰州730000

出　　处：《北京测绘》2024年第5期711-715,共5页Beijing Surveying and Mapping

基　　金：甘肃省自然资源厅科技项目(202253)。

摘　　要：为了评价西部地区山地和高山地区域高分七号立体测图精度,以及验证高分七号激光测高数据精度,本文基于高分七号立体影像,采用多种像控点布点方案进行区域网平差,分析不同方案对精度的影响。结果表明,采用七点法方案进行区域网平差后,立体模型的平面中误差为0.90 m,高程中误差为0.93 m,均满足1∶10000的山地和高山地测图要求,并且验证该地区激光测高数据精度为0.74 m,利用激光测高数据可以提高少地面控制甚至无地面控制点时立体影像的立体测图精度,为今后西部困难地区生产地形数据提供技术支撑。In order to evaluate the accuracy of Gaofen-7 stereoscopic mapping in mountainous and high-altitude areas in western China and verify the accuracy of Gaofen-7 laser altimetry data,multiple image control point layout schemes were used for block adjustment based on Gaofen-7 stereoscopic images,and the impact of different schemes on accuracy was analyzed.The results show that when the seven-point scheme is used for block adjustment,the mean square error of plane of the stereoscopic model is 0.90 m,and that of elevation is 0.93 m,both meeting the 1∶10000 mapping requirements of mountainous and high-altitude areas.It is also verified that the accuracy of laser altimetry data in the area is 0.74 m.The use of laser altimetry data can improve the accuracy of stereoscopic imaging of stereoscopic images with few or even no ground control points,providing technical support for the production of terrain data in difficult areas in western China.

关 键 词：高分七号 定位精度 数字表面模型匹配 立体测图 

分 类 号：P237[天文地球—摄影测量与遥感]