Hi Bob;

I'm flattered to say the least.

That program, like all my programs, is written in TrueBasic for Windows. I can do it in DOS as well but the Windoze version has some handy features like using enough memory to save the screen in one gulp.

The ironic thing about this is that I can't get a GIS job because I don't know ArcView. The fact that I've written programs like ArcView doesn't seem to matter.

I can post the program on my website once it's finished. I want to figure out how to make a printable file come out the right size for one of those balls. It's a neat way to look at some things....like seismicity.

Roger