[R-sig-Geo] output gstat and maps

[Marcelo Bruno]

Hi, members

I'm Marcelo, oceanographer from Brazil
and actually work with fishery acoustical data
of brazilian shelf. I'm using R, GMT, ArcView (windows)
in Linux redhat 9.0 (Athlon Xp 1.6Ghz, 20Gb 540mb mem).
I run kriging analysis using gstat (R1.8.1) in
fishery acoustic data:

x     y     sa (backscatering acoustic parameter)

the output is ordinary kriging surface.
I need overlap these output to a map of
Brazil coastal shelf and slope but i don't
make this. I have a file (ascii) of Brazil coastal,
and shapefile. Someone can helps me with this
problem? I try in gimp, kpaint and others but i
need a better solution to learn more in R.

Thanks in advance!
Marcelo