摘要
影像的高精度正射校正需要合适的控制点和DEM,但高分辨率的DEM往往较难获取。鉴于此,利用4种不同尺度的DEM生成高景一号卫星正射影像,并对其精度进行了评价和对比分析,以期为其正射校正实际应用选择何种尺度的DEM提供参考依据。结果表明,在丘陵区域开源DEM可使正射影像平面位置精度的均方根误差优于3 m,而采用5 m格网间距的DEM可使其精度提升至1.5 m。
The high-precision orthorectification of image needs appropriate control points and DEM,but the high-resolution DEM is often difficult to obtain.In this paper,we used four kinds of DEM with different scales to generate the orthoimages of SuperView-1 satellite,and evaluated and compared their accuracy,so as to provide a reference for choosing which scale of DEM for the practical application of orthorectification.The results show that the open-source DEM in the hilly area can make the RMSE of the plane position accuracy of orthoimages better than 3 m,and the DEM with 5 m grid spacing can improve its accuracy to 1.5 m.
作者
李俊杰
傅俏燕
LI Junjie;FU Qiaoyan
出处
《地理空间信息》
2021年第9期50-52,60,I0002,共5页
Geospatial Information
基金
国家重点研发计划资助项目(2018YFB0505000)。
