ArcGIS空间统计分析课件.ppt

1、ArcGIS ArcGIS 空间统计分析实习空间统计分析实习杜世宏杜世宏北京大学遥感与北京大学遥感与GISGIS研究所研究所研究生课程研究生课程一、一、ArcGIS ArcGIS 空间统计分析空间统计分析二、模式分析工具集二、模式分析工具集三、聚类分布工具集三、聚类分布工具集四、度量空间分布工具集四、度量空间分布工具集五、辅助工具集五、辅助工具集 ArcGIS ArcGIS 空间统计分析空间统计分析ArcGIS ArcGIS 空间统计分析空间统计分析ArcGIS ArcGIS 空间统计分析空间统计分析=n/k=50/48=1.041667=n/k=50/48=1.041667Where =th

2、e ave#of features per quadratn=the#of featuresk=the#of quadrats P(x)=eP(x)=e-x x/x!/x!P(x)=eP(x)=e-x x/x!/x!P(x)=eP(x)=e-x x/x!/x!Mean Center Simply the mean of X and Y Also called center of gravity Sum of differences between the mean X and all other X is zero(same for Y)NiiNiiNYYNXX11Weighted Mean

3、Center NiiiNiiiNYWYNXWX11Standard Deviation of X and Y NiiyNiixNYYSNXXS12121)(1)(Standard Distance Deviation constants twoare theresince distance standard of estimate unbiasedan provide topoints ofnumber thefrom 2subtract Wepoint ofnumber total theis N andcenter mean the and i,point,each between distance theis d where2)(iMC12 NiiMCxyNdSStandard Distance DeviationStandard Deviation EllipseStandard Deviational Ellipseellipse.an define andother each toorthogonal aredirectiony and x in the deviations standard two theare where2)(22 yonDistributix 100100100