[OSM-talk] US county import

[Frederik Ramm]

Ian,

> Yup, looks like you're right. In this particular case we could delete 
> that way, but what do you propose we do for the rest of the data?

I haven't a clue. I don't know how important county borders are and 
whether it would be possible to find a more reliable source for them. 
Problem I'm seeing is that it might be difficult for mappers to correct 
these borders because they are not visible on the ground (or are there 
signposts along a road saying "you are leaving county X/welcome to 
county Y"?). But generally the project prefers inaccurate data over no 
data...

The situation that I stumbled upon could probably have been detected 
programmatically by searching for county border polygons fully contained 
in other county border polygons which (I guess) would not happen in 
reality unless county can have enclaves/exclaves. One could thus extract 
the data set from OSM into a PostGIS and search for these cases. If one 
was determined. I'm not saying it must be done.

Bye
Frederik

-- 
Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"