[R-sig-Geo] image in a projected map

[Edzer J. Pebesma]

Agustin,

If your data are in a format provided by the sp package,
you could try several routes:
1. convert your grid (points) to points, project the points,
and contour there
2. calculate contours in lat/long (but which package can
do this well, esp. around the poles?), project the
contour lines and plot them
3. transform the grid to (many square) polygons, project
these and plot them, as shown in
http://r-spatial.sourceforge.net/xtra/xtra.RHnw.html#spproj

Hope this helps,
--
Edzer

José Agustín García García wrote:

>Hi all, I am working on some climate data and I 
>need to make some projected maps of the results 
>of climate models. These results are given in a 
>gridded format (lon,lat, z).  I have no problem 
>at making contourlines using the package sp and 
>spproj, but my problem arise when I am going to 
>do an image plot of the data, because the grid is 
>regular in lat-long coordinates but not in the 
>projected map.  Also, I have problems trying to 
>label meridians and parallels.  Any help is 
>wellcome.
>
>Sorry for my english
>
>Agustin
>  
>