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Position: Home > Articles > Extraction of Impervious Surfaces and Their Spatial Autocorrelation Analysis of Wuhan City in 2015 Hubei Agricultural Sciences 2017 (9) 1642-1647

武汉市2015年不透水面的提取及其空间自相关分析

作  者：
袁修柳;杨昆;王保云
单  位：
云南师范大学旅游与地理科学学院;西部资源与环境地理信息技术教育部工程研究中心
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
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,总体精度为94.17%,Kappa系数为0.898 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,Moran指数为0.241 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、汉阳区和硚口区都位于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。
译  名：
Extraction of Impervious Surfaces and Their Spatial Autocorrelation Analysis of Wuhan City in 2015
作  者：
YUAN Xiu-liu;YANG Kun;WANG Bao-yun;School of Tourism and Geographical Sciences,Yunnan Normal University;GIS Technology Research Center of Resource and Environment in Western China,Ministry of Education;
关键词：
Wuhan city;;impervious surface;;the classification and regression tree;;spatial autocorrelation;;Moran index;;Moran scatter plot
摘  要：
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 94.17%, and Kappa coefficient was 0.898 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 0.241 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 first 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 distribution. Overall, the impervious surface coverage of 13 regions in Wuhan in 2015 has strong spatial autocorrelation, and the center areas were high, and around areas were low, this tendency basically was consistent with the actual situation.

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