国产高分辨率遥感影像几何定位精度分析

Geometric Positioning Accuracy Analysis of Domestic High Resolution Remote Sensing Image

随着卫星、计算机和传感器技术的不断发展,高分辨率遥感影像在国民经济中的作用越来越明显,其高精度几何定位成了获取基础地理数据的关键步骤。本文以资源三号和高分二号影像为研究对象,通过数字正射校正,分析了在无控制点和不同控制点下的国产高分辨率遥感影像定位精度。实验结果表明:资源三号影像在无控制点情况下定位精度满足1∶100 000比例尺数字正射影像图生产要求,在1个控制点时定位精度满足1∶50 000比例尺数字正射影像图生产要求,不低于3个控制点时定位精度满足1∶25 000比例尺数字正射影像图生产要求;高分二号影像在无控制点时能够满足1∶5 000比例尺数字正射影像图生产要求,在不少于3个控制点时能满足1∶5 000比例尺数字正射影像图生产要求。

With the continuous development of satellite,computer and sensor technology,the role of high-resolution remote sensing image in the national economy is becoming more and more obvious.Its high-precision geometric positioning has become a key step to obtain basic geographic data.This paper takes the images of ZY-3 and GF-2 as the research objects,through digital orthorectification,the positioning accuracy of domestic high-resolution remote sensing image without and with different control points is analyzed.The experimental results show that the positioning accuracy of ZY-3 image meets the production requirements of 1∶100000 scale digital orthophoto map without control points,the positioning accuracy meets the production requirements of 1∶50000 scale digital orthophoto map at one control point,and the positioning accuracy meets the production requirements of 1∶25000 scale digital orthophoto map at no less than three control points;GF-2 can meet the production requirements of 1∶50000 scale digital orthophoto map without control points and 1∶5000 scale digital orthophoto map with no less than 3 control points.