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

Philip Barnes phil at trigpoint.me.uk
Wed Sep 19 19:26:21 UTC 2018


On Wed, 2018-09-19 at 21:16 +0200, Tobias Zwick 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).
> 
> Unfortunately, this is still common practice because of the lack of a
> scheme for tagging explicitly that the maxspeed is not signed.

If we went to that extreme, we would have very few speed limits mapped
in Europe.

Phil (trigpoint

> 
> 
> On 19/09/2018 09:47, Philip Barnes wrote:
> > And if the default actually applies, or has it been overriden by
> > local
> > signage.
> > 
> > I am not convinced that a default limit helps, if no speed limit
> > has
> > been surveyed I would prefer that box not to be displayed in my
> > app.
> > a. It will not give me wrong and possibly costly information.
> > b. It makes it obvious that I should survey and map the limit.
> > 
> > Phil (trigpoint)
> > 
> > On 19 September 2018 07:10:27 BST, Graeme Fitzpatrick
> > <graemefitz1 at gmail.com> wrote:
> > 
> > 
> > 
> >     On Wed, 19 Sep 2018 at 13:30, Joseph Eisenberg
> >     <joseph.eisenberg at gmail.com <mailto:joseph.eisenberg at gmail.com>
> > > wrote:
> > 
> >         So on the boundary=administrative admin_level=6 for Rogers
> >         County, we could have something like
> > maxspeed:type:default=45mph
> > 
> > 
> >     Just after crossing over the border into the state of
> > Queensland,
> >     you have this
> >     sign: https://www.google.com/maps/@-28.1592952,153.4932922,3a,7
> > 5y,288.32h,90t/data=!3m6!1e1!3m4!1sXT0hBPanAoGnfz9N-
> > Ugbyw!2e0!7i13312!8i6656
> >     <https://www.google.com/maps/@-28.1592952,153.4932922,3a,75y,28
> > 8.32h,90t/data=%213m6%211e1%213m4%211sXT0hBPanAoGnfz9N-
> > Ugbyw%212e0%217i13312%218i6656>
> >     (Incidentally, I think 7 of the 8 Australian states &
> > territories
> >     have the same limits?)
> > 
> >     I understand (I think!) that your system would set this as a
> > default
> >     for all Qld roads?
> > 
> >     But based on what? How does OSM know that this stretch of road
> > is in
> >     either a rural or a built-up area?
> >      
> >     Thanks
> > 
> >     Graeme
> > 
> > 
> > -- 
> > Sent from my Android device with K-9 Mail. Please excuse my
> > brevity.
> > 
> > 
> > _______________________________________________
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> > Tagging at openstreetmap.org
> > https://lists.openstreetmap.org/listinfo/tagging
> > 
> 
> 
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