[Talk-us] [OSM-talk] Karlruhe Scheme addressing ways from 2009 TIGER data

Dave Hansen dave at sr71.net
Sun Nov 15 06:44:21 GMT 2009


On Sat, 2009-11-14 at 21:35 -0500, Anthony wrote:
> Unless you can point me to some documentation as to what the tiger id
> *means* (*), I'm not going to think about it at all.  Sometimes I keep
> it, sometimes I delete it, sometimes I delete the whole way and create
> a new one in its place (without any of the tiger tags).  And I'm sure
> I'm not the only one.

I'd prefer that people preserve the TIGER data whenever possible.  It's
not a primary concern and don't let it slow down your mapping, but it is
a useful data point.

Let's say we're doing a future TIGER import.  Updated roads will have
the same TLID between different TIGER revisions and that gives us a good
starting point.  It's a third bit of data to augment any matching
decisions we make based on location and name.  We can get along without
it, but it *IS* useful.

Way history is fine as a backup, but tracing that through splits and
joins is not going to be easy.  It's much more straightforward to just
get it directly.

-- Dave





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