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I don't know of any R code for this, but there is a freely available software package from the US Geological Survey supporting over 70 different projections, including the ones you mention. You can get it from ftp://kai.er.usgs.gov/pub/Proj.4/ The relevant file is PROJ.4.3.3.tar.gz. The documentation is very good (get the the postscript files PROJ.4.3.ps.gz, OF90-284.ps.gz, and SWISS.ps.gz from the above directory). I know NetBSD has this in the Packages Collection http://www.netbsd.org/packages/misc/proj/ (I ought to know, I imported it). I think Debian GNU/Linux has it also. So if you use one of these systems you might not need to compile it yourself. Regards, Jason Beegan.> G' Day, > > > Can you please tell me if there is R code for geographic projections? ie lat, > lon -> x,y metres. I'm principally interested in Mercator and Lambert Equal Ar > ea Azimuthal. Failing R code - code in any language! > > > Many thanks > > > Bernie McConnell > > Bernie McConnell > > <color><param>0000,0000,ffff</param>NERC SEA MAMMAL RESEARCH UNIT > > </color>Gatty Marine Lab, St Andrews University > > St Andrews, Fife, KY16 8LB, Scotland. > > > b.mcconnell at smru.st-andrews.ac.uk > > http://www.smru.st-and.ac.uk > > tel: +44 (1334) 463280 > > fax: +44 (1334) 462632 > > > -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- > r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html > Send "info", "help", or "[un]subscribe" > (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch > _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._ >-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
>>>>> "Bernie" == Bernie McConnell <bm8 at st-andrews.ac.uk> writes:Bernie> G' Day, Can you please tell me if there is R code for Bernie> geographic projections? ie lat,lon -> x,y metres. I'm Bernie> principally interested in Mercator and Lambert Equal Area Bernie> Azimuthal. Failing R code - code in any language! Try PROJ (C library) at http://www.remotesensing.org/proj/ Adam -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
On Fri, 20 Apr 2001, Bernie McConnell wrote:> > Can you please tell me if there is R code for geographic projections? > ie lat,lon -> x,y metres. I'm principally interested in Mercator and > Lambert Equal Area Azimuthal. Failing R code - code in any language! >One good source is http://www.remotesensing.org/proj/ for the PROJ.4 software. Another is the mapproject program in GMT at http://gmt.soest.hawaii.edu/. These are both external to R, but it seems likely that PROJ.4 will form part of an R map package at some stage. You didn't say which platform you use - both these are native Unix/Linux, but at least GMT is available for NT too. While it would be possible to write R code to do this, both of these sources are well-tried and so more likely to work as expected. Roger -- Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Breiviksveien 40, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93 e-mail: Roger.Bivand at nhh.no and: Department of Geography and Regional Development, University of Gdansk, al. Mar. J. Pilsudskiego 46, PL-81 378 Gdynia, Poland. -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
www.freegis.org has a good summary of available projection packages. Tim Bernie McConnell wrote:> G' Day, > > Can you please tell me if there is R code for geographic projections? ie > lat,lon -> x,y metres. I'm principally interested in Mercator and > Lambert Equal Area Azimuthal. Failing R code - code in any language! > > Many thanks > > Bernie McConnell > Bernie McConnell > NERC SEA MAMMAL RESEARCH UNIT > Gatty Marine Lab, St Andrews University > St Andrews, Fife, KY16 8LB, Scotland. > > b.mcconnell at smru.st-andrews.ac.uk > http://www.smru.st-and.ac.uk > tel: +44 (1334) 463280 > fax: +44 (1334) 462632 > > -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- > r-help mailing list -- Read > http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or > "[un]subscribe" (in the "body", not the subject !) To: > r-help-request at stat.math.ethz.ch > _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._-- Timothy H. Keitt Department of Ecology and Evolution State University of New York at Stony Brook Phone: 631-632-1101, FAX: 631-632-7626 http://life.bio.sunysb.edu/ee/keitt/ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
Roger Bivand wrote:> http://gmt.soest.hawaii.edu/. These are both external to R, but it seems > likely that PROJ.4 will form part of an R map package at some stage. You^^^^^^^^^^^^^^^^^^^^^^^^^ Anyone working on this? Tim -- Timothy H. Keitt Department of Ecology and Evolution State University of New York at Stony Brook Phone: 631-632-1101, FAX: 631-632-7626 http://life.bio.sunysb.edu/ee/keitt/ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._