Thanks for the elucidation James.
After reading the .pdf of proj4 and your answer, I believe I won't need
proj4 package.
Well, I still don't know all the kind of transformations we will need here.
I'm just getting prepared to future data that is arriving soon.
Each time they come, there is a different coordinate unit...
I'll star elaborating the mathematic functions for conversions, and save
them in a safe place!
Anyway thank you so much!
Rodrigo.
--------------------------------------------------
From: "James Muller" <[EMAIL PROTECTED]>
Sent: Tuesday, September 16, 2008 1:48 PM
To: "R Help" <r-help@r-project.org>
Subject: Re: [R] Converting Geo-Coordinates Unities
I'd recommend just using a simple function for this particular thing,
and then use proj4 for complicated geographical transforms. This is
such an elementary operation it's not worth getting involved proj4,
which, as far as I'm aware, doesn't bother doing what you're wanting
anyway.
Now, proj4. What other sorts of transformations are you likely to be
doing? Do you know the ins-and-outs of projections and datums?
If not, you'll really need to learn something about these in order to
use proj4 correctly.
James
On Tue, Sep 16, 2008 at 12:35 PM, Rodrigo Aluizio <[EMAIL PROTECTED]>
wrote:
Hi everybody,
I'm looking for some package or function of R that can convert
Coordinates of Longitude and Latitude in different formats, such like:
Deg and decimals, UTM, degree minutes and seconds, etc...
I'm found something (Proj4 package) but I'm note sure if it's what I
need.
I have a sheet with tree columns, the first has the sample
identification, the second and third have the Longitude and Latitude,
respectively in D M' S''. I need to transform it into Degrees and
decimals.
I know that I can create a "function" with some basic mathematics to this
one, but I'll need to convert other formats in the future and it won't be
that easy. So, any suggestion well be appreciated.
Thanks in advice.
___________________________________
MSc. Rodrigo Aluizio
Centro de Estudos do Mar/UFPR
Laboratório de Micropaleontologia
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