[GRASS5] U.S. Census Tiger Files 2000...

Tom Rake duff_maps at hotmail.com
Mon Jul 23 17:37:41 EDT 2001


I just tried a few v.tig.in.lndmk imports with 2000 data and didn't find a 
problem with one dataset.

Ascii delimited dumps are fine with me.

RIM I don't use and hasn't been useful when I tried.

***** My Other Random Comments

I have been parsing the Tiger files separately using perl scripts driven by 
data dictionary files which I copy from the Tiger specs. I use these to 
stuff Postgres with selected data for each record type mostly keyed by TLID. 
I have had problems doing a v.reclass on v.tig.in.basic data (TLID are too 
big for C [] operations) so I build by own reclass map in perl and write 
.att and .cat file directly.

As a map company I class all chains that say are roads by name in a separate 
category so I deal with each and every name. Thus I deal with categories 
that number in the 10,000s or more.

-Tom Rake, The Duff Map Company.
>From: "Eric G. Miller" <egm2 at jps.net>
>To: GRASS5-dev <grass5 at geog.uni-hannover.de>
>CC: GRASSLIST <GRASSLIST at baylor.edu>
>Subject: [GRASS5] U.S. Census Tiger Files 2000...
>Date: Fri, 20 Jul 2001 18:33:46 -0700
>If anyone would confirm that GRASS 5.0 can't import TIGER 2000 files
>properly, I would appreciate it.
>Apparently, the Census Bureau has changed the format of some of the
>TIGER files slightly for the 2000 series.  From my simple trials,
>these changes don't affect v.in.tig.basic, but do break v.in.tig.lndmk.
>Also, I guess we aren't really supporting the RIM database with GRASS
>5.0?  Are people using this?  I haven't heard much about its use for a
>while, so I'm not sure if it's desireable to continue supporting it
>directly in v.in.tig.lndmk.
>What do people prefer for managing the attributes?  If I were to rewrite
>this to support 2000 files, would delimited ASCII dumps be acceptable
>(keyed via TLID, etc..).  I've still a bit of homework to do on the file
>Eric G. Miller <egm2 at jps.net>
>grass5 mailing list
>grass5 at geog.uni-hannover.de

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