[R-sig-Geo] Shifting a spatial object by (dx,dy)

[David Forrest]

Hi,

I've got a mis-projected UTM zone 18 polygon shapefile, the coordinates of 
which need a transformation of (+287.4395, -77.5542) added to them to be 
in WGS84/NAD83 UTM 18.  Since this is a non-standard CRS / non-EPSG CRS, 
I'm not sure about the best way to fix it.

Is there some function that would add this offset to the component 
polygon coordinates, bbox, and labpts data?

Dave
-- 
  Dr. David Forrest
  drf at vims.edu                                    (804)684-7900w
  drf5n at maplepark.com                             (804)642-0662h
                                    http://maplepark.com/~drf5n/