[OSM-talk] Tiger 2007 Data

[vegard]

On Sun, Oct 19, 2008 at 10:54:55AM -0700, Dave Hansen wrote:
> Has anyone looked at importing the TIGER 2007 data yet?  I was going to
> start coding up the conversion utilities to get started.  It appears
> that this shapefile format may have existing OSM converters out there.
> Anyone want to admit to having one? ;)
> 

I see it like this: What could be very useful to have, is a mapping
between tiger data (old set) and OSM data. It could be to late for this
round, but an external_id:tiger = XXXX that you'd *never* remove, is a
good thing. That'll help when updating.

Then you'll need to to a diff between the old data and the new data, and
find out which ID's are candidates for updating.

Then you could do a diff between old and OSM for those IDs. Anything
that's not touched in OSM --> update.

Anything else, I'm sure you'll have to do more or less manually, but I'm
sure you could automatize bits of it - like road classification changes,
name changes etc.

This is my rough proposal for how to handle large chunks of external
data.
-- 
- Vegard Engen, member of the first RFC1149 implementation team.