hi! maybe some links should be added on the website to projects using libkdtree (also to give some examples). here's my one: http://home.in.tum.de/~schreibm/idp/ ciao, martin -- Martin Schreiber | Enzianstrasse 7, S 104 | 85748 Garching bei Muenchen | GERMANY http://www.martin-schreiber.info