You can't ZIPs aren't actually polys. USPS publishes carrier routes and private parties turn them into polys that are somewhat representative. ZCTA from Census are free and prob good enough for what you need.
Ian White :: Urban Mapping Inc 690 Fifth Street San Francisco CA 94107 T.415.946.8170 x800 :: F.866.385.8266 :: urbanmapping.com/blog -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of P Kishor Sent: Friday, October 09, 2009 10:44 AM To: [email protected] Subject: [Geowanking] zip code lookup -- free A Federal agency (for now, nameless) publishes a dataset D, with the help of a private contractor, who has used a contractually restricted zip code database Z to implement the locator services for D -- enter a zip code in a form field and you get back the applicable entries from D. I want that service or that data for my work, but can't use it now because of the restriction in distribution of Z. I guess my only option is to get only D, which, I am assuming, is public domain, and integrate a zip code lookup service into it myself. Which brings me to the question -- where can I get a public domain or freely usable zip code db/map? -- Puneet Kishor http://www.punkish.org Carbon Model http://carbonmodel.org Charter Member, Open Source Geospatial Foundation http://www.osgeo.org Science Commons Fellow, http://sciencecommons.org/about/whoweare/kishor Nelson Institute, UW-Madison http://www.nelson.wisc.edu ----------------------------------------------------------------------- Assertions are politics; backing up assertions with evidence is science ======================================================================= Sent from Chicago, IL, United States _______________________________________________ Geowanking mailing list [email protected] http://geowanking.org/mailman/listinfo/geowanking_geowanking.org _______________________________________________ Geowanking mailing list [email protected] http://geowanking.org/mailman/listinfo/geowanking_geowanking.org
