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 首先使用基于图像间逻辑运算的水体提取方法提取出鄱阳湖水体;然后将提取的水体转化为矢量格式并统计得到鄱阳湖面积;最后,将提取出的矢量水面节点处的高程值进行插值得到的水面高程图与DEM相减,得到水深图,再根据水深图和栅格大小便可得到鄱阳湖的库容。实验结果表明,本文方法可以很好地提取出鄱阳湖水体,对于鄱阳湖面积与库容的估算,估算的结果与其他学者的结果相比偏大11%左右。文中提出的利用TM影像和DEM对鄱阳湖面积和库容进行估算的方法,可作为水域动态监测的一个新思路。 更多还原

【Abstract】 In this paper,firstly we extracted water body of Poyang Lake area based on the method Logic Operation which is used to extract water body between images.Then the grid-formatted files of water coverage were converted into vector-formatted ones and the area of Poyang lake was calculated by using attributes of the vector-formatted water.Finally water depth was generated by subtracting the elevation chart of water surface,which was got from the process of interpolation using DEM value at the vertice... 更多还原