From peter@caliper.com Thu Jun 24 15:11:12 1999 Received: from mxu4.u.washington.edu (mxu4.u.washington.edu [140.142.33.8]) by lists.u.washington.edu (8.9.3+UW99.02/8.9.3+UW99.01) with ESMTP id PAA41046 for ; Thu, 24 Jun 1999 15:11:12 -0700 Received: from iris.caliper.com (iris.caliper.com [198.22.17.3]) by mxu4.u.washington.edu (8.9.3+UW99.02/8.9.3+UW99.06) with ESMTP id PAA13775 for ; Thu, 24 Jun 1999 15:11:11 -0700 Received: from piquin (piquin.caliper.com [198.22.17.23]) by iris.caliper.com (8.8.5/8.8.5) with SMTP id SAA14969 for ; Thu, 24 Jun 1999 18:10:14 -0400 (EDT) Message-Id: <3.0.32.19990624181142.00fc5fa4@iris.caliper.com> X-Sender: peter@iris.caliper.com X-Mailer: Windows Eudora Pro Version 3.0 (32) Date: Thu, 24 Jun 1999 18:11:42 -0400 To: waphgis@u.washington.edu From: "Peter H. Van Demark" Subject: RE: ZIP lat/longs Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Alice: >You all know that some zips are institutional/non-geographic, right... And those are the ones that can not be area ZIP Codes. But all ZIP Codes can be assigned a point. E.g. the post office boxes at the Brookline MA station, which have an 02447 ZIP, have a point at approximately the location of that post office. Others may just be shown at the centroid of the area ZIPs that enclose them. For business ZIP Codes, the location of the business may be miles from the point used to represent their ZIP Code, but many of those businesses (such as banks) have many locations anyway. Aren't ZIP Codes endlessly fascinating and frustrating? Peter ---------------------------------------------------------------- Peter Van Demark Manager of Customer Services Phone: 617-527-4700 Caliper Corporation Fax: 617-527-5113 1172 Beacon Street E-mail: peter@caliper.com Newton MA 02461-9926 Web site: http://www.caliper.com .