Yes Stefan! This is what I meant: how would you tag the Kilometre_Zero? (nothing to do with the geographic centre of countries)
Cheers Francois Stefan Baebler wrote: > It might be that François wasn't talking about geographic centre of > countries, but established (read: old) reference points from times > where each country / region had their own coordinate system, or not > even real coordinate system, just measuring road distance from that > defined point. > > http://en.wikipedia.org/wiki/Kilometre_Zero > > enjoy, > Å tefan > > On Thu, May 15, 2008 at 8:52 AM, Mike Collinson <[EMAIL PROTECTED]> wrote: >> At 05:00 AM 15/05/2008, Francois De Ryckel wrote: >>>Hello everyone, >>> >>>How would you tag the "zero point" of a country? >>> >>>Shouldn't be an important tag as distances in a country are measure from >>>that point? >>> >>>Thanks for the advices. >>> >>> >>>François de Ryckel >> >> François, >> >> I don't know if this will suit your particular requirements, but I've >> published a list of "country bounds" here which includes a centre >> lat/lon: >> >> http://wiki.openstreetmap.org/index.php/User:Ewmjc/Country_bounds >> >> This was generated from US government (public domain!) GNIS data. This >> is a dataset of several million location points around the world >> conveniently categorised by country. I simply calculated a bounding box >> for each country and then the centre point of that box. >> >> I then generated about 80% of the OSM place=country tags using the >> centre point to locate the tag. The OSM database should now have a tag >> for every country in the world (at least as defined by the US >> government). >> >> There are some inaccuracies though and I am working on a version two. >> In particular, I included marine features which makes several boxes too >> large, and may throw the centre point to a strange location. Once I >> have this sorted, I intend to add a lat_max ... lon_min or some such >> tags to the country tags. You could then derive a "zero point" directly >> from the OSM database. >> >> Mike >> >> >> >> _______________________________________________ >> 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 > François de Ryckel _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
