R help - Mar 2009 - Mapping in R

Hi, I am looking for a specific mapping capability in R that I can't seem to
find, but think exists. I would like to make a border of a map have alternating
black and white squares instead of the common latitude and longitude grid. 
(example: http://www.cccturtle.org/sat_maps/map0bw8.gif). If anyone knows if
there is or is not a function capable if doing this could you please let me
know? Thanks!

Kelsey

Kelsey Scheitlin <kns07g <at> fsu.edu> writes:
> 
> Hi, I am looking for a specific mapping capability in R that I can't
seem to
find, but think exists. I would
> like to make a border of a map have alternating black and white squares
instead of the common latitude and
> longitude grid.  (example: http://www.cccturtle.org/sat_maps/map0bw8.gif).
If
anyone knows if
> there is or is not a function capable if doing this could you please let me
know? Thanks!
> 
> Kelsey
  It's not QUITE what you're looking for, but

plot(0:1,0:1,bty="n",axes=FALSE)
box(bty="o",lwd=6,lty="FF")

(See ?box, ?par under "bty" and "Line Type Specification")

Otherwise you can do this by using par("usr") to find the
edges of the map, seq() to construct appropriate x and y
sequences, and segments() to draw the lines.

  Ben Bolker