I agree that relations are the way to for borders. Here is an example of 3 border ways meeting at a point, but sharing National, State, Provence, and County boundary relations. It's where the New York/Vermont border meets the US/Canada/Quebec border: http://www.openstreetmap.org/?lat=45.01193&lon=-73.34281&zoom=15&layers=B000FTF Here's another example where the Ontario/Quebec border meets the Canada/US/New York border: http://www.openstreetmap.org/?lat=45.00428&lon=-74.66812&zoom=15&layers=B000FTF
In the Vermont area I have manually removed all but one way at each border and made that way a member of the appropriate relations. Bit of a pain, but it's mostly done now. For the US/Canada border I've found the Canadian Geobase data to be more accurate than the TIGER data. Zeke Farwell Burlington, VT On Tue, Mar 31, 2009 at 12:22 PM, Richard Weait <[email protected]> wrote: > On Tue, 2009-03-31 at 10:00 -0600, James Ewen wrote: > > The end result, is that I would concur that the GeoBase borders are > > much closer to the real world location than the manually input border, > > or the USGS imports. > > > > So, now we need to clean up the erroneous data. > > > > The county outlines in the US are circular ways, the GeoBase ways are > > not.Will it affect rendering by cutting up the US county circular > > ways, and making them part of a combined way? Can I cut the GeoBase > > ways at the Alberta, BC and US confluence, and then add in a bunch > > more tags to the common borders? Can we tag the same way as a > > border_type: state, and also border_type:international, then do > > state:left, province:right, county:left, county:right, etc? > > I think relations are the way to go. > Tag the way with the source, uuid and attribution. > Split the way at each prov/state/county/regional municipality junction. > Add tags only at highest level relation for say, name, place, > population, ... > Include the way in Canada relation - boundary=admin, admin_level=2 > Include the way in USA relation - boundary=admin, admin_level=2 > Include the way in state/prov/muni/county relations as appropriate. > > > > _______________________________________________ > Talk-us mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/talk-us >
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