辐射沙脊群海域地貌骨征线遥感解译探讨

Remote Sensing Interpretation of Morphological Skeleton Line in Radial Sand Ridges Area

基于同相水深-辐射关系率定原理,选取环境与灾害监测预报卫星(HJ)遥感影像特征波段,提取辐射沙脊群海区水下地形辐射等值线,利用辐射等值线来勾画地貌骨征线。结果表明,辐射等值线直观上具有地形等高线分布的效果,与等深线的特点相似,能够反映水下地形特点。通过辐射等值线确定辐射沙脊群地貌骨征线,具有一定的实用价值。

Based on the theory of rating relation between water depth and its radiation under isomorphic water body, this paper selected HJ characteristic bands of remote sensing images,extracted radial sand ridges sea area underwater terrain radiated contours and used radiated contours to outline the morphological skeleton line. The results show that the radiated contours have the ef ect of terrain contour distribution intuitively, and having similar characteristics with isobaths, can rel ect the characteristics of the underwater terrain. To determine the radial sand ridges morphological skeleton line by radiated contours has theoretical rationality and visualized operability.