On 4 Oct 2009, at 08:12, Igor Brejc wrote: > Hi, > > For days now I've been trying to figure out how I could render borders > between England, Wales and Scotland using OSM data, but I keep > stumbling > into same issues. Frankly, I think the way these things are tagged > in UK > is a mess (I don't know what the situation is in other places): > > 1. Borders between these countries are tagged with the same > admin_level=4 as that of subdivisions inside England (example: > North East England, http://osm.org/go/evykef-?relation=151164). > Now I'm not a constitutional expert, but I think Wales and > Scotland represent different level of territorial division than > just a collection of England's counties. And anyway, the > http://wiki.openstreetmap.org/wiki/Tag:boundary%3Dadministrative > states level 4 is used for "England/Scotland/Wales border" and > doesn't mention anything else. > 2. There is no way to render JUST land borders. Maritime borders > (territorial waters) are tagged exactly the same way as their > continental counterparts. And even if you accept this limitation > and decide to render territorial waters they are usually cut off > in the available UK OSM extracts. > 3. England's coast is also tagged as a border, but Wales' and > Scotland's isn't. > > Please take my criticism as a constructive one. I'm trying to use OSM > data in a real-life situation and I think borders are some of the more > important data, since they are usually visible in smaller-scale maps > (but usually _without_ marked territorial waters). The way UK's > borders > are now tagged, the only way to render them usefully would be to > manually collect a list of OSM ways' IDs. > > Of course I could go and edit these things myself, but since I'm not > usually covering this part of the world, I don't want to step on other > people's toes :)
I have cross-posted this to talk-gb and I suggest that we continue the conversation there. We certainly need to use different levels for the UK and england/ scotland/wales but as always with borders it is a bit sensitive about how one does it. Is Scotland a 'country' or a 'region' etc. Regards, Peter > > Best regards, > Igor > > -- > http://igorbrejc.net > > > _______________________________________________ > talk mailing list > t...@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
