[Talk-us] TIGER deserts -- progress so far

[Eric Fischer]

Hi. Sorry to be confusing. Yes, the blue parts are where the old TIGER mess
had already been corrected by 2006, so what was imported is still correct
as far as TIGER knows (although perhaps still not right in reality). The
magenta parts are where TIGER has changed since the import and are good
candidates for retracing.

However a lot of the magenta has been independently fixed in OSM. It would
be more useful to check the TIGER Battle Grid or the composite TIGER layer
in iD to see where major discrepancies remain. I'm not sure what
methodology Green Means Go uses so I hope Mike Migurski can clarify that.

Eric
On Mar 1, 2014 1:19 PM, "Abhishek" <cheerfulguy at gmail.com> wrote:

> I've been trying to understand what work has happened to help the
> TIGER-fixup process. Because there was so much going on, I found it
> useful to summarize my learnings in a diary entry. Posting it here in
> case someone else finds it useful:
> http://www.openstreetmap.org/user/dalek2point3/diary/21111
>
> Am I right in thinking that according to Eric Fischer's diff of Tiger
> 2013 and Tiger 2006, TIGER had "finished" correcting the blue parts of
> this map when we imported them -- http://i.imgur.com/mooFiXr.png and
> the magenta parts were fixed by 2010, and were therefore not a part of
> the import?
>
> Overlaying the magenta areas with user densities, and picking off area
> that have no users seems like obvious candidate for using the new
> TIGER data. I feel like this is what "Green Means Go" tries to do, but
> I dont quite see a similar pattern in that map, so I'm confused about
> what is actually going on.
>
> Abhishek
> ------------
> http://abhishek.mit.edu
>
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