[R-sig-Geo] convert long/lati to UTM

[Barry Rowlingson]

On Thu, Jul 9, 2009 at 9:23 PM, Paul Hiemstra<p.hiemstra at geo.uu.nl> wrote:
> Hi,
>
> More in general you need to take a look at the sp-pacakge for Spatial
> classes in R. Once your data is in these classes you can use spTransform
> from the rgdal pacakge to perform the projection. spTransform uses the proj4
> library. You need to find the so called proj4 strings describing both the
> source and target projection.
>

 There seems to be several ways of reprojecting/coordinate transforming in R...

 package:sp, in ?is.projected, mentions an spproj package which I
can't find. Is that just a documentation error?...

 package:rgdal has spTransform as mentioned...

 package:proj4 seems to be an independent interface to the PROJ4 library.

Barry