[Tagging] default value [was: Short-term parking zones]

[Martin Koppenhoefer]

2018-01-23 12:58 GMT+01:00 marc marc <marc_marc_irc at hotmail.com>:

>
> it separates the work into 2 distinct tasks:
> if I see a "urban area" sign, I tag maxspeed:type=urban.
> I automatically take advantage of the default values existing on
> boundary without having to worry about which hierarchical level is
> responsible for the panel I see, because this info is not visible
> on the panel. a BE:VL:urban sign is the same as the one for Brussels.
> how to change all BE:urban in Flanders to BE:VL:urban ?
> using a is_in with the boundary ?
> it shows that the info "the effect of this panel use the rule
> for BE:VL" is already in osm. the problem is that we don't use it.
>


while it is true that you can mark the urban zones this way (in some cases,
see below), it isn't how maxspeed works as of now: you also have to add an
explicit value anyway, which you can only do if you know under whose
competence the road falls, and what limit is the default. A problem with
maxspeed:type is that the proponents haven't learnt from the experiences
made in the past 8 years. The tag works exactly the same as does
source:maxspeed. If I were to redesign the tagging I'd want to seperate the
tags for the traffic zone (urban, rural, etc.) from the type of speed limit
(implicit / explicit), because it is a valuable information alone. As it
stands, you can only tell rural from urban streets if they don't have a
maxspeed sign.

Cheers,
Martin
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