I imported the US county borders a couple weeks ago and did not use left/right tagging. Instead, I let the borders overlap. The county borders are also overlapping with the state and country borders, too, I imagine.
In most cases, the data sources for county, state, and country borders don't even come close to overlapping: http://openstreetmap.org/?lat=44.1793&lon=-76.27&zoom=13&layers=B00FF I kept it as it is because at the time I didn't think it was worth the effort of writing a much more complicated import tool to make the data harder to use (but make it easier to look at). On Wed, May 28, 2008 at 2:42 PM, Beau Gunderson <[EMAIL PROTECTED]> wrote: > The US national border with Canada is all tagged with admin_level=4, > border_type=state, border=administrative... It also has the left/right > countries (at least the bit I looked at in WA did). > > How should state borders that are also national borders be tagged? > > Does setting admin_level=2 fix the whole problem? > > As you can see, they're not currently visible at low zooms: > > http://www.openstreetmap.org/?lat=48.83&lon=-118.46&zoom=7&layers=B00FF > > > Beau > > On Wed, May 28, 2008 at 1:21 PM, Steve Chilton <[EMAIL PROTECTED]> > wrote: > >> The latest mapnik stylesheet has the National borders moved from coming in >> at z10 to coming in at z7. Now zooms to z6 show the borders as thin blue >> lines taken from the shape files, and then switch to OSM data at z7 using a >> slightly thicker purple line. >> Not all borders show, for one of two reasons - either they are not >> digitised or are not tagged appropriately. >> So, it would be useful if folk have a look at their own country/area at >> z7. >> Does in show correctly? >> If not: >> 1 - check whether it has been digitised. If not - is there a valid, >> non-copyrighted source for putting in the border alignment. >> 2 - check whether it is tagged boundary=administrative, admin_level=2. If >> not - change the tagging to that so that it may show. >> >> As a reminder, admin boundaries should be tagged for the admin_level that >> they are (at the highest level). Country/national borders are always >> admin_level=2. Internal borders should be tagged according to the suggested >> schema for that particular country. Details are on the wiki at: >> http://wiki.openstreetmap.org/index.php/Key:boundary >> which also explains the accepted way to tag for the countries on either >> side of the border. >> >> Cheers >> STEVE >> >> _______________________________________________ >> talk mailing list >> [email protected] >> http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk >> > > > _______________________________________________ > talk mailing list > [email protected] > http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk > >
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