Interesting you should mention dual-carriageways -- there was some discussion a while back:
http://wiki.openstreetmap.org/index.php/Proposed_features/Left/right_things about how to "push things outwards" from road centrelines... On Tue, Mar 25, 2008 at 2:18 PM, Lars Aronsson <[EMAIL PROTECTED]> wrote: > OJ W wrote: > > > Sounds very similar to the cycleway tagging in Bedford; treat it > > as a separate way if it's not on the road, which makes it easy > > to show if it takes detours away from the road: > > But I want it to be just next to the street, with no gap and no > overlap, and getting this right requires that I know how it will > be rendered (which I don't), and there still is no chance I would > get it perfectly right. It does make more sense to draw one way > at the street's centerline and then use attributes to describe all > the various lanes for cars, buses, bikes and sidewalks as a list > with the width of each lane in metres. How far away is it that > Osmarender or Mapnik would render something like that? > > We have this problem with motorways already, that two ways > (northbound and southbound) run perfectly parallel in reality, but > on the map the distance between the ways is not always the same. > If this was mechanics, I would put a spacer washer between them. > > > -- > Lars Aronsson ([EMAIL PROTECTED]) > Aronsson Datateknik - http://aronsson.se > > _______________________________________________ > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk >
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