Watch the above video in high-​definition on Vimeo.

Source code is avail­able (1.5MB):
http://​car​son​baker.​org/​w​p​-​c​o​n​t​e​n​t​/​u​p​l​o​a​d​s​/​2​0​0​8​/​0​7​/​t​h​o​m.zip

The point data set is not included. Down­load it from the Google project site.