【摘要】 选取几何校正后用作基础性地理国情监测的高分二号遥感影像,计算布设的检查点与同名像点残差,绘制残差分布图对几何校正精度进行评价,同时引入空间自相关系数Moran’s I指数评价检查点残差的空间随机性。实验得出,检查点平均残差为1.63 m,平面精度可满足国家1∶10 000正射影像技术要求,且检查点的残差在空间上呈现随机分布,无明显方向性,影像的几何校正效果较好。更多还原

【Abstract】 In this paper,GF-2 remote sensing image used for the basic geographical situation monitoring after geometric correction is selected. Calculating the residuals between checkpoint and corresponding image points and drawing the residual distribution is to evaluate the accuracy of geometric correction. At the same time,Moran’s I index is introduced to evaluate the spatial randomness of checkpoint residuals. The result shows that the average residual of checkpoint is 1.63 m,the plane accuracy meets the national 1 ∶10 000 orthophoto technical requirements,and the residual of checkpoint is randomly distributed in space without obvious directionality,so the geometric correction accuracy of the image is better.更多还原