[gradsusr] getting x/y positions of contours

[James T. Potemra]

I was wondering if it was possible to get (x,y) or (lon,lat) positions 
of contour lines instead of, or in addition to, the lines being drawn on 
the page?  I'm trying to use GrADS to generate a contour plot, then 
display contours as lines on googlemap page.  I can do it as a raster 
over-lay, but the resolution is less than optimal, particularly when 
zooming.  Thanks in advance,

Jim