遥感在校准岛礁轮廓线中的应用

On Calibration of the Position and Shoreline of Island and Reef Using Remote Sensing

在海洋地质调查中,往往需要编制地形地貌、地球物理等各种图件,这些图件均涉及陆地或岛礁的岸线或轮廓线。目前我们所使用的岸线资料因各种原因,在部分海域存在看位置偏移犬、轮廓线不准的问题。岸线或轮廓线的准确程度,影响到测线的布置、船舶的行驶安全等,有必要对其进行校准。本文在评估遥感影像定位精度的基础上,以南沙部分岛礁为例,依据岛礁在影像上的特征,提取得到的岛礁轮廓线比山有的轮廓线在轮廓范围、定位精度上耍准确,可以在.定程度上满足海洋地质调查生产的需要。

In the marine geological survey,various maps of topography,geophysics and so on need to be compiled,these maps involve island or reef shoreline.At present,the shoreline data we used,for various reasons,there is a big deviation of position or inaccurate of contours in some areas.The accuracy of shoreline will affect the survey line layout and the ship's driving safety and so on,it is necessary to carry out calibration.Based on the assessment of the position accuracy of remote sensing image and according to the characteristics of the island or reefs in the image,we extracted the shorelines of part reefs of the South China Sea.The shorelines are more accurate than the old ones in the range and positioning accuracy.To a certain extent,it can meet the needs of marine geological survey and production.