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基于DMSP/OLS数据的中国大尺度城镇用地信息提取

DOI: 10.6046/gtzyyg.2013.03.26, PP. 159-164

Keywords: DMSP/OLS,较高分辨率数据比较法,城镇用地,分区

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Abstract:

DMSP/OLS夜间灯光数据已在城镇用地信息提取中得到较多应用,其中,较高分辨率数据比较法是一种较为客观的方法,但现有研究主要通过逐个城市确定灯光数据的阈值提取城镇用地信息,这对于大尺度的城镇研究所需成本较大、处理效率较低。为此,提出了一种基于分区的较高分辨率数据比较法,将中国按经济发展程度划分为7大区,分别对各区提取城镇用地信息,并对提取结果进行真实城镇像元判定,得到1992,1995,2000年中国的城镇用地信息。结果表明,采用分区的方法不仅提高了较高分辨率数据比较法的提取效率,反映了特定区域的城镇整体状况,而且在总体区域上保证了提取精度。

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