Just an idea, but have you looked at Wolfram Alpha? http://www.wolframalpha.com/examples/PlacesAndGeography.html Greg Greg Lawson Rolling Hills Consolidated Library 1912 N. Belt Highway St. Joseph, MO 64506 ---------------------- ----- Original Message ----- From: "Erik Lewis" <elewis@ngrl.org> To: "KOHA" <koha@lists.katipo.co.nz> Sent: Friday, December 4, 2009 4:11:09 PM GMT -06:00 US/Canada Central Subject: [Koha] slightly off topic I've been playing around with geocoding my patron data. Got the longitude and latitude for all my patrons which is a good start. Unfortunately I'm having difficulty locating a tool that will convert either the address or the long/lat into US Census tract and block data. If anyone has a tool or suggestion I'd appreciate a nudge or a kick in the right direction.