try following the instructions here
http://www.gpsmeter.com/index.php?page=faq14 to find an epsg code
then something along the lines of
spTransform(data, CRS=CRS("+init=epsg:xxx"))
should work?

cheers
rob


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Dr Rob Robinson, Principal Ecologist
British Trust for Ornithology, The Nunnery, Thetford, Norfolk, IP24 2PU
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====== "How can anyone be enlightened, when truth is so poorly lit" =======



On 17 September 2013 00:09, Waichler, Scott R <Scott.Waichler@pnnl.gov>wrote:

> Erin, thanks, I'm getting closer.  Rgdal's projInfo() lists UTM, which I
> believe is closely related to the State Plane Coordinate system, but I
> still don't see a direct transformation to SPC in R.  --Scott Waichler
>
>
> > Could you mean spTransform from rgdal, please?
> >
> > ________________________________________
> > From: r-sig-geo-bounces@r-project.org [r-sig-geo-bounces@r-project.org]
> on
> > behalf of Waichler, Scott R [Scott.Waichler@pnnl.gov]
> > Sent: Monday, September 16, 2013 4:33 PM
> > To: r-sig-geo@r-project.org
> > Subject: [R-sig-Geo] function to convert to/from U.S. State Plane
> > Coordinates?
> >
> > Hi,  Does an R function exist to convert to and from the State Plane
> > Coordinates system used in the U.S.?  My search with Rseek was fruitless.
>
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> R-sig-Geo@r-project.org
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>

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