The CM-1 satellite,as the first high-precision forest resource detection satellite in China,is of great significance to the analysis of its optical stereoscopic image positioning accuracy and DSM quality.Firstly,in this paper,the reference image and AW3D30 DEM are used to match a certain amount of control points on the CM-1 satellite stereoscopic image,and the block adjustment is carried out to verify the stereoscopic positioning accuracy of the CM-1 satellite image.Then,the DSM data extracted by CM-1 stereo image are compared with AW3D30 DEM and ICESat-2 laser altimetry data respectively.Finally,mean value,standard deviation and root mean square error are used to evaluate the accuracy of DSM extracted by CM-1 stereo images.The results show that,under the controlled condition,compared with the digital orthophoto map,the plane positioning accuracy of CM-1 satellite stereo image in the plain area reaches 1 m,and the elevation positioning accuracy in the plain area reaches 1.57 m compared with AW3D30 DEM.The DSM accuracy by forward and backward image extracting is higher than that by forward and nadir image,nadir and backward image extracting.
维普
万方数据