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From: mgfleury@netcom.com (Mark Fleury)
Newsgroups: comp.infosystems.gis,info.grass.user
Subject: Re: zipcode boundaries from Tiger
Message-Id: <mgfleuryCr4M95.C2u@netcom.com>
Date: Sat, 9 Jun 94 10:53:29 GMT 01:00:00 +0000 (GMT)
References: <2t4vd9$i9u@news.udel.edu>
Organization: NETCOM On-line Communication Services (408 261-4700 guest)
Lines: 13
My understanding from talking with Census is that ZIP code info not a part
of TIGER. Some features (<1%) may have ZIP info. My efforts to build ZIP
polygons produced a few disconnected line segments. Census would like to
include this info in TIGER2000 but are under severe budget limitations.
Also: In detail ZIP boundaries are continually changing to meet mail
delivery needs.
If ZIPs are located between street blocks (along allyways) as are many
voter districts, the location would have to be moved to an existing TIGER
feature (not correct) or new featrues would have to be added to TIGER.
This could nearly double the size of highly urban county files - would it
be possible to handle Los Angeles County at over 300Mbytes? And TIGER
itself would increase at $250/CD-rom.
I too wish the ZIP data was in TIGER, but doing so might create a nightmare.