Hi, In the days when I had more time to work on this stuff I looked into programming continuous cartograms for maptools. If I remember correctly Danny Dorlings approach produced really nicely arranged circualr cartograms. I also remember that the optimization he used was fairly inefficient and could take a looooong time if you had many polygons. I think there is a note in Jason Dyke's CDV software about that. I think the speed of Dorling's algorithm could be much improved with the application of a little computational geometry, but like I said it is a few years since I looked at this.
As far as interactivity, iplots is one solution. I played with trying to embed cdv in R using the tcltk interface, but it wasn't as well developed as it is now, and I am not a good tcltk programmer. Another thing I tried was embedding ggobi in openEV, Frank Warmerdam's map viewing tool. That approach seemed to have promise, and openEV plays nicely with other languages. Cheers Nicholas _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
