高分辨率遥感影像的定位不确定性探析

Analysis of positional uncertainty based on high-resolution remote sensing images

空间数据的不确定性已成为遥感与GIS研究的一个热点。高分辨率影像的空间定位不确定性是在几何校正、地面控制点判读及选取等过程中引入的误差而产生的,并导致误差从地形图传播到影像上。为了减少高分辨率影像定位的不确定性,通过使用手持式GPS进行野外测点,来验证SPOT 5(2.5m分辨率)遥感影像空间定位存在的误差,并分析其产生原因及与地形的关系等。

Uncertainty of. space data has been a hotspot in the field of RS and GIS researching. The position uncertainty of high-resolution remote sensing images come from the processing of geometric correction, interpretation and selection of GCPs, so that the errors are transmitted from topographic map to the remote sensing images. In order to reduce the position uncertainty of the remote sensing, We use GPSs to collect the GCPs outside, checking the SPOT 5 remote sensing images position errors, analyzing the cause of the uncertainty and the relation between uncertainty and landform.