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

[Stuart Wagenius]

Steve,

I've used package PBSmaping to convert from UTM  to Lat/Long and back.
I posted a dataset, a snippet of R code, and the resulting file as a
recent blog entry:

http://blog.lib.umn.edu/wage0005/echinacea/2009/07/spp_coordinates.html

You may find it helpful.

Stuart

On Thu, Jul 9, 2009 at 4:25 PM, Steve Hong<seunghong at wisc.edu> wrote:
> 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
>> >
>> >_______________________________________________
>> >R-sig-Geo mailing list
>> >R-sig-Geo at stat.math.ethz.ch
>> >https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>> >
>>
>> --
>> 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
>>
>
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