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

GRASS GIS GRASS GIS developer
1

Eric,

I have a convention to go to (and will be away from computers) won't be back until tuesday July 31. I'll take the source to review on the plane. So any work I do on this won't be until August. But I am glad to contribute what I can.

-Tom Rake, The Duff Map Company.

From: "Eric G. Miller" <egm2@jps.net>
To: Tom Rake <duff_maps@hotmail.com>
CC: egm2@jps.net, grass5@geog.uni-hannover.de
Subject: Re: [GRASS5] U.S. Census Tiger Files 2000...
Date: Mon, 23 Jul 2001 20:17:35 -0700

On Mon, Jul 23, 2001 at 05:37:41PM -0400, Tom Rake wrote:
> FWIW:
>
> I just tried a few v.tig.in.lndmk imports with 2000 data and didn't find a
> problem with one dataset.

Hmm. I couldn't get it to work right with the line or area classes.
Maybe I'll try a different data set.

> 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.

Hmm, don't know why TLID's are too big. If an "int" == "long", then it
should accomodate numbers up to 2147483647. Are there TLID's that
exceed this?

> 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.

You should rewrite the Tiger routines! You obviously know TIGER files
better than I...

--
Eric G. Miller <egm2@jps.net>
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