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I am tagging a named trail (the Avon trail) where it goes through private land and there is only private access for part of the time. I tagged it as foot=private foot:conditional=permissive@(Apr 15-Nov 30 dawn-dusk);private@(Dec 01-Apr 14;dusk-dawn) which is correct. But the unconditional part is much more prominently displayed than the conditional part in the web interface. Is there a better way to tag this situation? I really don't want to have permissive show up more prominently than the conditional access nor do I want to have nothing show up there as well.

asked 31 Jan '21, 15:15

Peter%20Patel-Schneider's gravatar image

Peter Patel-...
accept rate: 0%

If the tagging is correct, I wouldn't worry about it. There will always be edge cases were the rendering is not as we'd like; there will always be routers that don't understand foot:conditional.

At some point anyone writing a router or a renderer has to ask themselves how complicated they want to make it before they stop.

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answered 03 Feb '21, 21:55

SomeoneElse's gravatar image

SomeoneElse ♦
accept rate: 16%

I tend to put the more "cautious" option in the standard tag and the other option in the conditional tag. Say there is a 30km/h speed limit in front of a school during day time I would tag max_speed=30 and maxspeed:conditional=50@("night time"). So an app not knowing conditional tags would display the safer 30 and a driver at night can take a joy in driving faster when they discover the signage if they like it.

Following that logic I would tag the private access as standard access and the permissive as conditional access just as you did it. That way hikers would discover a welcomed shortcut when they turn up at the location instead of having to take a long detour to what they had originally planned assuming a open path in March.

Still, I believe your tagging is a bit redundant. The tags
foot:conditional=permissive@(Apr 15-Nov 30 dawn-dusk)
already define the rule completely. The foot= gives the standard case and the foot:conditional= the exception. Your additional ;private@(Dec 01-Apr 14;dusk-dawn) merely repeats the standard. There is no harm done doing it that way it may just cause tagging errors later on when someone else tries to update the tagging.

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answered 04 Feb '21, 09:10

TZorn's gravatar image

accept rate: 15%

These are good heuristics - general/non-conditional is more restrictive; don't be redundant.

But in some cases redundancy seems like a good idea - vehicle=private and snowmobile=private to emphasize that snowmobiles are not allowed (partly because some people don't consider snowmobiles to be vehicles).

(09 Feb '21, 17:20) Peter Patel-...

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question asked: 31 Jan '21, 15:15

question was seen: 1,153 times

last updated: 11 Feb '21, 09:32

NOTICE: is no longer in use from 1st March 2024. Please use the OpenStreetMap Community Forum