[OSM-talk] TIGER 101

[Ben Gimpert]

On Thu, 30 Nov 06 @02:49pm, Schuyler Erle wrote:
> * On 30-Nov-2006 at  2:18PM PST, Ben Gimpert said:
> > 
> > Every time you encounter a TIGER lat/long point, you'll need to do a
> > search across the lat/long of already-imported nodes within, say, a 1000
> > miles.  (Beware of very long, straight rural roads.)  If you find a node
> > with the same lat/long -- where "same" is some function incoporating the
> > rural-ness of the area -- then you can reuse that node.
> 
> That was my point. Since TIGER/Line *is* topological by design, just
> like OSM, it is definitely possible to reuse nodes out of the box.
> More to the point, you don't need to keep track of every node in the
> universe, just every node in a simple TIGER/Line file. Not impossible
> at all.

You're assuming that -- for example -- there are no roads that cross
county borders, no roads that might span more than one FIPS .RT1/2 file.
I doubt this is the case.

		Ben