文档介绍：武汉市2015年不透水面的提取及其空间自相关分析
摘要:利用分类回归树(CART)从高分一号遥感影像提取武汉市2015年不透水面,%, 6,满足精度要求。然后通过Moran指数I和Moran散点图对武汉市13个城区的不透水面盖度进行了空间自相关分析。结果表明, 2,高度显著,说明武汉市13个城区的不透水面盖度存在较强的正向空间自相关。同时,位于武汉市中部的武昌区、青山区、江岸区、江汉区、汉阳区和?~口区都位于Moran散点图的第一象限,说明武汉市不透水面在中部地区高度集聚;其他7个城区位于第二象限,说明这7个城区的不透水面盖度较低且呈离散分布。总体而言,武汉市2015年13个城区不透水面盖度存在较强的空间自相关,且中部高,四周低,与实际情况基本一致。
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关键词:武汉市;不透水面;分类回归树;空间自相关;Moran指数;Moran散点图
中图分类号:TP79 文献标识码:A 文章编号:0439-8114(2017)09-1642-06
DOI:-
Extraction of Impervious Surfaces and Their Spatial Autocorrelation Analysis of Wuhan City in 2015
YUAN Xiu-liu1,2,YANG Kun2,WANG Bao-yun2
( of Tourism and Geographical Sciences, Yunnan Normal University, Kunming 650500, China; Technology Research Center of Resource and Environment in Western China, Ministry of Education, Kunming 650500, China)
Abstract: The impervious surfaces of Wuhan in 2015 were extracted from the GF1 remote sensing image by the classification and regression tree (CART). The Overall accuracy was %, and Kappa coefficient was 6. Then spatially autocorrelation analysis of the impervious surface coverage of 13 regions of Wuhan was carried out by Moran index and Moran scatter plot. The results showed that Moran index was 2, and reached highly significant, which indicated that there was a strong positive spatial autocorrelation in impervious surface coverage of 13 areas of Wuhan. Meanwhile, Wuchang district, Qingshan district, Jiangan district, Jianghan district, Qiaokou district and Hanyang district in the central of Wuhan were located in the f
irst quadrant of Moran scatter plot, indicating the impervious surfaces of Wuhan highly concentrated in the central region; other seven regions in the second quadrant, indicating that impervious surface coverage of these seven area were low and presented discrete