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

[Steve Hong]

Thank all of you for responding! I will take a look at rgdal.

Cheer!

Steve

----- Original Message -----
From: Roger Bivand <Roger.Bivand at nhh.no>
Date: Thursday, July 9, 2009 4:04 pm
Subject: Re: [R-sig-Geo] convert long/lati to UTM
To: Barry Rowlingson <b.rowlingson at lancaster.ac.uk>
Cc: Paul Hiemstra <p.hiemstra at geo.uu.nl>, sch at entomology.wisc.edu, r-sig-geo at stat.math.ethz.ch


> On Thu, 9 Jul 2009, Barry Rowlingson wrote:
> 
> >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?...
> 
> Documentation error, will be corrected.
> 
> >
> >package:rgdal has spTransform as mentioned...
> >
> 
> Correct, a good deal based on your work for vector data and projection.
> 
> >package:proj4 seems to be an independent interface to the PROJ4 library.
> >
> 
> Odd and unhelpful, a one-off attempt to replace mapproj, which works 
> together with the maps package, but has unclear license conditions. 
> This package doesn't interface with any other spatial packages, and 
> the author has never replied to questions about coordinating to get 
> rgdal on CRAN as an OSX binary package. Use proj4 or maptools is you 
> must, rgdal for preference - spproj was a development vehicle for 
> methods that are now in rgdal.
> 
> Roger
> 
> >Barry
> >
> >_______________________________________________
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> >R-sig-Geo at stat.math.ethz.ch
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> >
> 
> -- 
> Roger Bivand
> Economic Geography Section, Department of Economics, Norwegian School 
> of
> Economics and Business Administration, Helleveien 30, N-5045 Bergen,
> Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
> e-mail: Roger.Bivand at nhh.no
>