我该如何在一个"raster"对象后面绘制一个shapefile对象?它们各自单独绘制得很好,但点无法覆盖在栅格上:
require(rgdal)
require(maptools)
require(raster)
myproj = "+proj=utm +zone=12 +north +ellps=WGS84 +units=m"
shp = readShapeSpatial(fn.shp, proj4string = CRS(myproj))
ras = raster(fn.tif)
plot(ras)
plot(shp, bg="transparent", add=TRUE)