[R-sig-Geo] projecting data from decimal degrees to meters

[ONKELINX, Thierry]

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.Onkelinx at inbo.be
www.inbo.be

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-----Oorspronkelijk bericht-----
Van: r-sig-geo-bounces at r-project.org [mailto:r-sig-geo-bounces at r-project.org] Namens Tiago Marques
Verzonden: maandag 17 februari 2014 14:10
Aan: r-sig-geo at 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

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