[Tagging] maxspeed:type vs source:maxspeed // StreetComplete

Martin Koppenhoefer dieterdreist at gmail.com
Fri Sep 21 23:03:55 UTC 2018

sent from a phone

> On 19. Sep 2018, at 21:16, Tobias Zwick <osm at westnordost.de> wrote:
> This is a good argument against tagging an explicit maxspeed=X when
> there is actually no speed limit sign around (X is what the OSM mapper
> by his knowledge about the law thinks should be the default limit here).

everything that you map will be according to your understanding of it, I cannot see a good argument for not tagging implicit limits, even more as there is judgement needed based on the situation (something humans can do much better than computers). Every holder of a driving license should have the requisites to recognize the speed limit on a given piece of road in their local area, so it doesn’t require specialist knowledge.

We already have a reliable way to distinguish implicit from explicit limits (we even have several of them), if you want to treat them differently in your app, you can do it.

There actually is a speed limit on most roads, including those without explicit signage. Omitting it will leave us in the situation that it really becomes unclear whether there is no sign or nobody has bothered to enter it.


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