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NB: I'm based in the UK, where (mini-)roundabouts go clockwise. I thought I'd fix some local map bugs though osmose. I notice that osmose flags this: with: However, the wiki states that direction should be indicated on mini-roundabouts, as the default is anti-clockwise: Tag:junction=roundabout (see the examples) Which is correct?
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In this case, Osmose and the OSM wiki disagree. The OSM wiki says:
and specifically on a page about the United Kingdom:
Road signs in the United_Kingdom Osmose, however, seems to use a different rule (from reading its source code): Default value: "anti-clockwise" for countries that drive on the right, and "clockwise" for countries that drive on the left. osmose_config.py contains a list of countries with the side they drive on. While Osmose's rule makes sense, I believe the Wiki should take precedence here. Also, when in doubt, I'd choose the simpler rule, so Wiki wins again. So I'd advise to ignore Osmose's complaints, and file a bug on GitHub: https://github.com/osm-fr/osmose-backend When adding a mini roundabout with potlatch2, in edit mode, the icon shows anti clockwise, but by default the node seems to be unset. when editing an unset ordinary roundabout setting oneway made it default to clockwise. (in GB we drive on left).
(09 Feb '16, 11:18)
andy mackey
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My personal opinion is that it really doesn't matter whether a UK mini-roundabout is tagged as direction=clockwise or not. I wouldn't add direction=clockwise if the tag was missing or remove it if it was present. An anti-clockwise mini-roundabout is far more likely to be a tagging error than a genuinely anti-clockwise mini-roundabout. There are currently 2 allegedly anti-clockwise mini-roundabouts in the UK - see http://overpass-turbo.eu/s/ekM . If there were a significant number of genuine exceptions then it might be worth tagging it, but we don't tag "driving_side" throughout the UK just because Savoy Court http://www.openstreetmap.org/way/4253954 is (famously) an exception to the side of the road we drive on. As a bit of extra info, here's an Overpass Turbo link for driving_side ways which covers most of the UK:
(10 Feb '16, 21:44)
SomeoneElse ♦
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Any competent router should be aware which country the route is being created & have appropriate rules built to suit, making the tagging pointless. |
I have now opened an issue on Osmose Github https://github.com/osm-fr/osmose-backend/issues/95