On Friday 18 April 2008 19:25:37 Peter Miller wrote: > I hope I didn't come across as aggressive, but I did want to point out some > really weird inconsistencies that do need to be resolved and wanted to > encourage debate. In the UK a secondary roads is a minor road, in San > Francisco this > <http://maps.yahoo.com/#mvt=s&lat=37.668663&lon=-122.485307&zoom=18> > junction (a multilevel road with multiple flyovers) is classed as secondary > whereas this > <http://maps.yahoo.com/#mvt=s&lat=37.428439&lon=-121.909597&zoom=19> one > (an urban road with traffic signal controlled junctions) is classed as > primary. > > > > I suspect that fact reason that the first is classed as secondary is > because the mapper wanted an orange road and that it should really be a > 'trunk' road. > > > > I really don't mind what the rendered colours are, that is for local > discussion and there may even be multiple versions with different styles as > far as I am concernedm, but currently the rendering is uk-centric and that > seems inappropriate for the USA and seems to be causing distortions with > tagging.
I think most people agree with that, but as said, there's a technological barrier to overcome. > I do think that the hierarchy of road classes needs to be respected across > OSM (where a trunk road is more important than primary road than secondary > road etc) allowing a routing engine to direct drivers worldwide onto the > main routes (and also possibly keep pedestrians and cyclists off them). I > do think that the '_link' element needs to be used to help sat-nav systems > give meaningful instructions and not give out information about turning > onto link roads when it should say 'turn onto Highway 101'. I do think the > description of the highway road classes in Map Features needs to be > internationalised to allow people in new countries to chose the right > mapping to their own infrastructure and naming and colour conventions. It already is. See http://wiki.openstreetmap.org/index.php/Key:highway#International_equivalence for the current definitions. Regards, Matt Williams > Personally I hope that San Francisco will prove a useful test case where > many of the outstanding internationalisation issues can be bottomed out > before there before large scale tagging across many other parts of the > country. > > > > Currently everything except interstate is tagged as 'residential'. If it > was agreed that state highways should be 'trunk' roads then would it be > sensible to design a 'bot' to scan un-touched tiger data for road names > including the word 'state' but not the word 'interstate' and automatically > update the tags from 'highway=residential' to 'highway=trunk' (or whatever > is agreed).
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