RE: [CTPP] Census Geography Question

Ed, I checked in with our GIS folks about this. Here is Michael's response: There were significant changes in our blocks between 2000 and 2010, but I don't think census data was ever meant to be compared across decades on a block-by-block basis. Tracts are better for that. Census does publish Block Relationship Files (http://www.census.gov/geo/www/2010census/rel_blk.html) which could be useful, but these are not a one-to-one relationship. Hope this helps. Thera Thera Black Thurston Regional Planning Council 2424 Heritage Court SW, Ste A Olympia, WA 98502 360.956.7575 ext 2545 www.trpc.org -----Original Message----- From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces@chrispy.net] On Behalf Of Ed Christopher Sent: Tuesday, December 06, 2011 4:44 PM To: ctpp-news(a)chrispy.net Subject: [CTPP] Census Geography Question Today i got this question from an MPO friend of mine and was hoping others on the list could help me. Anyone experiencing similar issues. ------------- Ed We have experienced the frustration of block boundaries between the 2000 Census and the 2010 Census being dramatically different within our urbanized area. Our GIS experts have had a difficult time assembling and reconciling the differences in order for us to simply compare data on a block-by block basis. Do you know if this is unique to us or are we in the same boat as others? -- Ed Christopher FHWA Resource Center Planning Team 4749 Lincoln Mall Drive, Suite 600 Matteson, IL 60443 708-283-3534 (V) 708-574-8131 (C) _______________________________________________ ctpp-news mailing list ctpp-news(a)chrispy.net http://www.chrispy.net/mailman/listinfo/ctpp-news