Test whether a Raster* or other object has a longitude/latitude coordinate reference system (CRS) by inspecting the PROJ.4 coordinate reference system description.
couldBeLonLat also returns
TRUE if the CRS is
NA but the x coordinates are within -365 and 365 and the y coordinates are within -90.1 and 90.1.
# S4 method for BasicRaster isLonLat(x, ...) # S4 method for Spatial isLonLat(x, ...) # S4 method for BasicRaster couldBeLonLat(x, warnings=TRUE, ...) # S4 method for Spatial couldBeLonLat(x, warnings=TRUE, ...)
Raster* or Spatial* object
TRUE, a warning is given if the CRS is
NA or when the CRS is longitude/latitude but the coordinates do not match that
additional arguments. None implemented