MASS, grid, png, RgoogleMaps, RColorBrewer
methods, MASS, grid, png, RgoogleMaps, RColorBrewer, mgcv
methods, MASS, grid, png, RgoogleMaps, RColorBrewer, mgcv,
plyr
methods, MASS, grid, png, RgoogleMaps, sp, rgdal,
RColorBrewer, mgcv, plyr
methods, MASS, grid, png, RgoogleMaps, OpenStreetMap, sp,
rgdal, RColorBrewer, mgcv, plyr
methods, MASS, grid, png, RgoogleMaps, OpenStreetMap, sp(>=
2.1-1), RColorBrewer, mgcv, plyr
lattice, methods, MASS, grid, png, RgoogleMaps, OpenStreetMap,
sp(>= 2.1-1), RColorBrewer, mgcv, plyr