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ncdf包用来处理NetCDF文件(http://cran.r-project.org/web/packages/ncdf/index.html);maps包可连接一些地理学数据库并展示地理图(http://cran.r-project.org/web/packages/maps/index.html);RArcInfo 包可读取ArcInfo v.7二进制文件和*.e00文件(project.org/web/packages/RArcInfo/index.html);maptools 包...
Thus, applying map algebra using the developed GWR model generated a raster map with 3065×6530m 2 cell size. The map showed that SOC composition to 20cm depth varied from 3.5 to 85.0 metric tons per hectare (ton/ha) with a mean and standard deviation of about 23.9 and 9.3ton/ha, ...
Local variability of GWR model in each rural district is shown in Fig.9.a. The size of dots in the map illustrates the prediction accuracy of GWR model in different rural districts. Local collinearity of GWR model is examined to evaluate the fitness of model via calculating condition numbers ...