I think centroid ZIP+4 data would be fine. That is, I'd be happy with a CSV file where each row comprises the zip+4 and a lat, long representing the center point of that zip+4. Does that exist anywhere? Thanks, --Armand
From: Lynwood Bishop [mailto:[email protected]] Sent: Friday, October 15, 2010 10:17 AM To: Armand Prieditis Cc: [email protected] Subject: Re: [Geowanking] zip+4 shapefiles Armand, I believe what you are looking for is the combined ZIP+4 / Tiger product from USPS http://www.usps.com/ncsc/addressmgmt/tiger.htm Last time I checked it costs about $700. As far as I know there is no authoritative free source for this data. Also, you might be thinking about getting "carrier route shapefiles / polygons" - a carrier route is the basis for discounts on volume mailings and this allows you to visualize where those mailings will be going to. Good luck, Lynwood -- LYNWOOD BISHOP, PRESIDENT MapLarge, Inc. <http://maplarge.com/> P.O. BOX 8482 ATLANTA, GEORGIA 31106 DIRECT: 404.797.3408 FAX: 678.298.8702 Email: [email protected] <mailto:[email protected]> http://www.maplarge.com <http://www.maplarge.com/> On Fri, Oct 15, 2010 at 1:04 PM, Armand Prieditis <[email protected]> wrote: Hi, I was wondering if anyone knows where I can find zip+4 shapefiles (e.g. polygons). The few companies that I found who supposedly sell this data have mostly empty entries for at least half of the zip+4s. Is there a direct (free) government source for these shapefiles? Thanks, Armand _______________________________________________ Geowanking mailing list [email protected] http://geowanking.org/mailman/listinfo/geowanking_geowanking.org
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