Markus, It's *possible* something like the Grid Analysis and Display System (GrADS) (http://www.iges.org/grads/) could do the trick if you tweaked the data right — but that may be too much of a chore. Look at the image here http://www.iges.org/grads/gadoc/tutorial.html down the page a bit.
Regards, Tom > Dear Markus and List, > > The most interesting project I have seen along these lines is Doantam > Phan's flow map layout. It's in Java, however.... > > Link: > http://graphics.stanford.edu/~dphan/code/flowmap/ > > regards, > -Frank > > On 6/1/07, Frank Hardisty <[EMAIL PROTECTED]> wrote: > >> ---------- Forwarded message ---------- >> From: Markus Loecher <[EMAIL PROTECTED]> >> To: r-sig-geo@stat.math.ethz.ch >> Date: Fri, 1 Jun 2007 14:56:27 -0400 (EDT) >> Subject: [R-sig-Geo] flow visualization in lat/lon space >> Dear list users, >> has anyone experience in visualizing "flow" (e.g. with arrows or curvy >> lines) on maps ? For example, I would like to draw/visualize the major >> traffic flow patterns between counties in California. >> There is a lot of flow visualziation software out there but none of them >> seem to create the "pictures" on true geographic maps. >> (It would be really, really cool to modify kmloverlay to do this) >> >> Thanks a lot, >> >> Markus >> >> _______________________________________________ >> R-sig-Geo mailing list >> R-sig-Geo@stat.math.ethz.ch >> https://stat.ethz.ch/mailman/listinfo/r-sig-geo >> >> >> > > > -- Thomas E Adams National Weather Service Ohio River Forecast Center 1901 South State Route 134 Wilmington, OH 45177 EMAIL: [EMAIL PROTECTED] VOICE: 937-383-0528 FAX: 937-383-0033 _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo