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converting from NAD83 datum to lat,lon

Hi Erin,
I tried that but ended up getting this error. Does the spTransform
function requires the data to be as data.frame?
Here is what i did to read the data

library(maptools)
library(rgdal)
nc.river<-readShapeSpatial("~/hydromaj/hydromaj_arc.shp") #reading the
shape file

nc1.wgs84 <- spTransform(nc.river,CRS("+proj=longlat +datum=WGS84"))
Error in spTransform(xSP, CRSobj, ...) :
  No transformation possible from NA reference system


Thanks again
Migee
On Mon, Feb 25, 2013 at 5:47 PM, Hodgess, Erin <HodgessE at uhd.edu> wrote: