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本文用实例研究了我国引进的C波段机械合成孔径侧视雷达图像在不同地域范围、不同地貌类型条件下的比例尺、点位、线段和面积误差。并在此基础上,根据该雷达图像的影像特征,建立了雷达图像的土地和森林类型分类系统和判读标志,进行了土地和森林类型的判读及森林区划的试验。研究结果表明,该图像已具有一定的几何精度,有较好的可供作境界线、林班线区划的地性线信息,以及土地和森林类型的可判性。因此,我们认为,它在森林资源调查及动态监测等方面具有一定的实用价值。
In this paper, we study the scale, point, line segment and area error of C-band mechanical synthetic aperture side-view radar image imported in our country under different landform types and different landform types. On this basis, based on the image features of the radar image, land and forest type classification system and interpretation mark of radar image are established, and land and forest type interpretation and forest zoning test are carried out. The result of the research shows that the image has a certain degree of geometric accuracy, and has better information about the georegular line available for the boundary of the border line and the forest block line, as well as the discriminability of the land and the forest type. Therefore, we think it has certain practical value in forest resources investigation and dynamic monitoring.