On Sun, Feb 24, 2008 at 12:35 PM, Lester Caine <[EMAIL PROTECTED]> wrote: > Richard Fairhurst wrote: > > Lester Caine wrote: > > > >> We need ONE set of rendering rules that will produce consistent > >> results > > > > No we don't - that's half the point of OSM. If we had ONE set of > > rendering RULES then we wouldn't have a CYCLE map. > > I'm not talking about STYLE - I'm talking base data! > > ANY map can display what it wants, how it wants, but they will all have the > same problem where there are conflicts between area and node data. NOTHING > precludes rendering what ever we want, but how does the cycle map solve this > conflict?
However I see fit. It's my map, and I can quite literally do whatever I want. I take the data from the database, do some "magic", and out comes a map. If I choose to do things differently than whatever osmarender or the main mapnik map does, then so bit it. I might render just parking areas. I might put in some nodes. I might do both, or do neither. Now I say this as an illustration of what each renderer does - they make their own decisions as to what to do. I don't even understand why you want consistency in the outputs - the main osmarender and mapnik layers are different, and much of it just comes down to cartographic style. As to the specifics of how mapnik works, see osm2pgsql's "add_parking_node()" at http://trac.openstreetmap.org/browser/applications/utils/export/osm2pgsql/output-pgsql.c#L362 for the code to auto-add a parking node. On the main map it has parking as non-overlapping as per http://trac.openstreetmap.org/browser/applications/rendering/mapnik/osm.xml#L154 so the duplicate icon issue is "solved" by this overlap avoidance. And if you think this is particularly onerous for the renderers to deal with, then you're probably unaware of how much other stuff needs to be taken care of too! Cheers, Andy > Just ignore 'parking' and this particular problem goes away, but if > someone decides parking needs to be on the cycle map which area/node data > should it work with? Do you have to re-write the renderer every time someone > comes up with a new conflict? > > > -- > Lester Caine - G8HFL > ----------------------------- > Contact - http://home.lsces.co.uk/lsces/wiki/?page=contact > L.S.Caine Electronic Services - http://home.lsces.co.uk > MEDW - http://home.lsces.co.uk/ModelEngineersDigitalWorkshop/ > Firebird - http://www.firebirdsql.org/index.php > > _______________________________________________ > > > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk > _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
