If you build it "they" will come! We have a guy named Stan Herd from Lawrence that does more representational crop art but I'm sure he uses some of the same techniques!
http://www.lasr.net/travel/city.php?Lawren...11a021&VA=YThe website above uses some "fairly" intrusive active elements that tend to hang up my Firefox here in the office.
Mainly I wanted to post the picture from the website which is of a "Medicine Wheel" he made for Haskell Indian Nations University in Lawrence. I've not seen this from the ground or the air myself but I think it's about a mile from my house.