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热带地理  2015 

基于dmsp/ols夜间灯光数据提取城镇建设用地的邻域分析法

, PP. 193-201

Keywords: dmsp/ols,夜间灯光影像,城镇建设用地,城镇扩展,遥感

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Abstract:

?为提高城镇建设用地提取的精度,文章提出一种基于dmsp/ols夜间灯光数据邻近象元特征差异的提取城镇建设用地的邻域分析方法。该方法主要是通过栅格运算识别建设用地和非建设用地的突变,结合阈值法准确提取建设用地边界。将该方法应用于2009年中国大陆34个主要城市的建设用地提取,并与基于tm数据以及基于dmsp/ols数据传统全局阈值法和局部优化法提取的建设用地进行比较。结果显示,该方法提取的建设用地象元数与tm影像提取的象元数呈较好的相关性(r2=0.966),均方根误差为191.64个象元,相对精度为82.79%,景观形状指数、聚集度指数、边缘面积比指数和连接度指数也具有较高的相似性(r2分别为0.4754、0.3662、0.8589和0.9153)。该方法不仅能准确识别大面积的城市建设用地斑块边界,而且不会漏掉小面积的城市建设用地斑块,克服了传统全局阈值法和局部优化法的缺点。

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