Packages with projections and inverse projections

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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