[R-sig-Geo] plotting latlon axes of sp object of different projection

[Horacio Samaniego]

I need to add a lat/lon axes to an equal area plot of a
SpatialLinesDataFrame object currently in units of meters. Is that
achievable using sp/maptools?

The .prj file where the object comes from is:
PROJCS["Lambert_Azimuthal_Equal_Area",GEOGCS["GCS_unnamed
ellipse",DATUM["D_unknown",SPHEROID["Unknown",6370997,0]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Lambert_Azimuthal_Equal_Area"],PARAMETER["latitude_of_origin",45],PARAMETER["central_meridian",-100],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["Meter",1]]

I'ld hate to install arcinfo to generate 1 plot! (plus the plot is
already nice as it is!!! just need the axes!)

thanks,
I'll summarize!

H

-- 
Horacio Samaniego

Center for Nonlinear Studies
Los Alamos National Laboratory
MS B258
Los Alamos, New Mexico 87545

Instituto de Silvicultura
Universidad Austral de Chile
Valdivia, Chile