Hi Tiago, The first two points are in water??
This might be helpful: library(sp) library(rgdal) orig <- data.frame(lat = c(23.2383,23.2383,23.2383), long = c(-78.3133, -78.3100,-78.3100), elv = c(4.01, 4.00, 4.00)) coordinates(orig) <- ~long+lat proj4string(orig) <- CRS("+proj=longlat +ellps=WGS84") orig <- spTransform(orig, CRS("+proj=utm +zone=18 +north +units=m +ellps=WGS84")) Applied spatial Data analysis with R is best book to look for such solution. Cheers, Vikram. On Mon, Feb 17, 2014 at 6:53 PM, ONKELINX, Thierry <thierry.onkel...@inbo.be > wrote: > Dear Tiago, > > You can use spTransform from the sp package. Note that you need to know > what the current and new projection and datum of your data is. > > Best regards, > > Thierry > > ir. Thierry Onkelinx > Instituut voor natuur- en bosonderzoek / Research Institute for Nature and > Forest > team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance > Kliniekstraat 25 > 1070 Anderlecht > Belgium > + 32 2 525 02 51 > + 32 54 43 61 85 > thierry.onkel...@inbo.be > www.inbo.be > > To call in the statistician after the experiment is done may be no more > than asking him to perform a post-mortem examination: he may be able to say > what the experiment died of. > ~ Sir Ronald Aylmer Fisher > > The plural of anecdote is not data. > ~ Roger Brinner > > The combination of some data and an aching desire for an answer does not > ensure that a reasonable answer can be extracted from a given body of data. > ~ John Tukey > > -----Oorspronkelijk bericht----- > Van: r-sig-geo-boun...@r-project.org [mailto: > r-sig-geo-boun...@r-project.org] Namens Tiago Marques > Verzonden: maandag 17 februari 2014 14:10 > Aan: r-sig-geo@r-project.org > Onderwerp: [R-sig-Geo] projecting data from decimal degrees to meters > > Dear List, > > Sorry if this is a very basic question, I've searched around and could not > find a simple answer to it. I am familiar with R, but not with geo/GIS > stuff. I have a matrix zs containing 3 columns, longitude, latitude and > depth. Depth is available at a regular grid of points covering > approximately 200 by 200 km in the Bahamas. The first few lines of the data > are below: > > head(zs) > lat long z > 1 23.2383 -78.3133 4.01 > 2 23.2383 -78.3100 4.00 > 3 23.2383 -78.3066 4.00 > 4 23.2383 -78.3033 4.00 > 5 23.2383 -78.3000 4.00 > > I would like to implement some animal movement simulations, and my > movement model is parametrized in terms of displacement, in meters. How can > I project zs to a matrix containing say x,y,z in which the x,y are in > meters. > > Best, and many thanks in advance for any advice coming this way. > > Tiago > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > * * * * * * * * * * * * * D I S C L A I M E R * * * * * * * * * * * * * > Dit bericht en eventuele bijlagen geven enkel de visie van de schrijver > weer en binden het INBO onder geen enkel beding, zolang dit bericht niet > bevestigd is door een geldig ondertekend document. > The views expressed in this message and any annex are purely those of the > writer and may not be regarded as stating an official position of INBO, as > long as the message is not confirmed by a duly signed document. > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo