多光谱浅海水深提取方法研究

利用我国南海某岛礁的TM数据和实测水深资料,试验性地研究了一种在不同底质反射条件下多光谱定量提取水深信息的方法,计算了浅海岛礁水深,取得了较好的应用效果和较高的测深精度.

A STUDY OF SHALLOW WATER DEPTH EXTRACTION USING LANDSAT IMAGERY

A quantitative technique for shallow water bathymetry has been described and evaluated in this paper. First,the information of the bottom type was extracted by analyzing multispectral characteristics of remote sensing images for some well-known points.Second,on the basis of the identification of coral stone and sand,image calibration brightness logarithmic values were selected from the imagery for locations of water depth measurements and two regression curves were established, which can be used for water depth prediction in other areas based on imagery from similar limpid environments.The results prove that the performance is satisfactory in shallow water and suggest that with further refinement the technique can be used to give a quick comprehensive estimation of shallow water depths.