资源描述:
《武汉市2015年不透水面的提取及其空间自相关分析》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、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,总体精度为94.17%,Kappa系数为0.8986,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0.2412,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
2、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。本文采集自网络,本站发布的论文均是优质论文,供学习和研究使用,文中立场与本网站无关,版权和著作权归原作者所有,如有不愿意被转载的情况,请通知我们删除已转载的信息,如果需要分享,请保留本段说明。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)09-1642-06D0I:1
3、0.14088/j.cnki.issn0439-8114.2017.09.011ExtractionofImperviousSurfacesandTheirSpatialAutocorrelationAnalysisofWuhanCityin2015YUANXiu-liul,2,YANGKun2,WANGBao-yun2(1.SchoolofTourismandGeographicalSciences,YunnanNormalUniversity,Kunming650500,China;2.GISTechnologyResearchCentero
4、fResourceandEnvironmentinWesternChina,MinistryofEducation,Kunming650500,China)Abstract:TheimpervioussurfacesofWuhanin2015wereextractedfromtheGF1remotesensingimagebytheclassificationandregressiontree(CART).TheOverallaccuracywas94.17%,andKappacoefficientwas0.8986.Thenspatiallya
5、utocorrelationanalysisoftheimpervioussurfacecoverageof13regionsofWuhanwascarriedoutbyMoranindexandMoranscatterplot.TheresultsshowedthatMoranindexwas0.2412,andreachedhighlysignificant,whichindicatedthattherewasastrongpositivespatialautocorrelationinimpervioussurfacecoverageof1
6、3areasofWuhan.Meanwhile,Wuchangdistrict,Qingshandistrict,Jiangandistrict,Jianghandistrict,QiaokoudistrictandHanyangdistrictinthecentralofWuhanwerelocatedinthefirstquadrantofMoranscatterplot,indicatingtheimpervioussurfacesofWuhanhighlyconcentratedinthecentralregion;othersevenr
7、egionsinthesecondquadrant,indicatingthatimpervioussurfacecoverageofthesesevenareawerelowandpresenteddiscretedistribution.Overall,theimpervioussurfacecoverageof13regionsinWuhanin2015hasstrongspatialautocorrelation,andthecenterareaswerehigh,andaroundareaswerelow,thistendencybas
8、icallywasconsistentwiththeactualsituation.Keywords:Wuhancity;impervi