Steve Hill wrote: > On Mon, 7 Apr 2008, Frederik Ramm wrote: > >> If it's done consistently, one can still create relations automatically >> later >> if desired. > > But this is kind of the point - if you are able to automatically create > the relations (and presumably automatically fix them if someone makes the > way tags inconsistent with the relation tags) with very little effort, is > there a good reason to create them in the first place rather than deriving > that data as and when you need it?
I harp back to *MY* original request. That there is a mechanism created for managing hierarchical data properly. Looking for ref=M11 is no use what so ever if there are M11's in several countries? Until there is some UNIQUE way of tagging high level relationships consistently, then there seems little point trying to fix fine detail at the lower level. It brings back up the simple problem of producing a unique list of objects in the data. How DO we currently identify all roads in the UK, so that we don't end up with some of the simply silly links that the likes of Autoroute returns when asking for a location. We need a consistent UNIQUE index method that will allow all 'ref=M11' elements in the UK to be identified as that one element. This may need the is_in to be correctly flagged, but what is actually missing is some HASH method whereby M11,UK is identified as #12345 while M11,NZ is #12346. This may well need some automated methods to manage it, but until there is some agreement on HOW the problem should be solved is there any point discussing how you combine disjointed bits of some road and flag the direction information needed to direct people through them? If I am searching for UK information I need some means of identifying it without having to do polygon transforms on 100s of thousands of elements when the boundary surrounding them is not even complete yet :( Please can we at least start with a set of objects that define the countries of the world and consistently uses them to define those elements that are within each country? -- Lester Caine - G8HFL ----------------------------- Contact - http://home.lsces.co.uk/lsces/wiki/?page=contact L.S.Caine Electronic Services - http://home.lsces.co.uk EnquirySolve - http://enquirysolve.com/ Model Engineers Digital Workshop - http://medw.co.uk// Firebird - http://www.firebirdsql.org/index.php _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
