Date:         Mon, 28 Jun 1999 10:00:34 -0700
Reply-To:     "William W. Viergever" <wwvierg@IBM.NET>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         "William W. Viergever" <wwvierg@IBM.NET>
Subject:      Re: ZIP-level boundary, population  or demographic info
Comments: To: Tom Frenkel <taf2@IS8.NYU.EDU>
In-Reply-To:  <Pine.OSF.3.95.990628115502.7401H-100000@is8.nyu.edu>
Content-Type: multipart/alternative;

I didn't know that they would/could forcast backwards.

Claritas is *the* shop now that they bought Strategic Mapping (they who made
Atlas Map) back in early 1996. They then sold the "mapping" part of the
business to ESRI (they of Arc View).

Note: the *data* part of Stategic Mapping was the old Donnelley Demographics
data that Strategic had bough a few years prior. In the "old days" Urban
Decision Systems and Donnelley were the only game in town.

I, however, find the Claritas pricing a bit severe. I've found that a company
down in Thousand Oaks, CA, whose data is just as tight (they work intimately
with the Big Three Credit Bureaus - who in turn usd this company's demographic
files).

It's called:

Applied Geographic Solutions, Inc.
3025 Sunflower Street
Thousand Oaks, California 91360
805.492.4765
http:/www.appliedgeographic.com

I also get my Zip code boundary files from a New Hampshire company called:

GDT (Geographic Data Technology). They also sell a high end product called
Dynamap which is the mosr robusr street level body od data I've seen. With this
database, you can geo-code just about anything.

Later



At 11:59 AM 6/28/99 -0400, Tom Frenkel wrote:
>We use "Claritas" as a source for our census data.  What they do, is
>project the current zip-code configuration back in time.  Thus, even if
>there wasn't a zip code of, say, 54321 in 1980, they will produce
>population, etc. figures for it just as if it did exist back then.
>
>        --Tom
>
>Tom Frenkel
>Assoc. Research Scientist
>Center for Health & Public Service Research
>New York University
>taf2@is8.nyu.edu
>
>On Mon, 28 Jun 1999, William W. Viergever wrote:
>
>> Do you realize how much these "boundary files" cost and the extent to
>> which the zip codes change over time (especially in Calif.)?
>> ...

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William W. Viergever                      Voice  : (916) 483-8398
Viergever & Associates                    Fax    : (916) 486-1488
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