[R-sig-Geo] Packages with projections and inverse projections

[Roger Bivand]

On Fri, 13 May 2011, brwin338 wrote:

http://cran.r-project.org/web/views/Spatial.html

under Reading and writing spatial data

points to rgdal, which provides complete PROJ.4 support for sp objects in 
spTransform() and for matrixes of coordinates in project().

Roger

>
> Good morning, Are there any R packages that have coded the functions 
> involved in projecting long-lats into alternative map projection units 
> AND have also coded the inverse projections from the alternative map 
> projection units into long-lat units?  I have two vectors of coordinates 
> in Lambert Conic Conformal units (along with all the associated LCC 
> projection parameters) that I want to project into long-lat units. I 
> will also want to transform a set of long-lat coordinates back into the 
> LCC units for plotting purposes .  I can code my own functions for this 
> application but I was hoping that someone had already written a set of 
> functions for projections and inverse projections for most of the 
> commonly used projections.
>
> I have not yet figured out if I can use 'mapproj' to obtain my desired 
> results.
>
> A related question:  Is there an R package that could be used to 
> reproject a given shapefile and create and save a new shapefile with the 
> new projection? Thanks Joe
>
>
>
>
>
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-- 
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