[Tagging] hydrants

François Lacombe fl.infosreseaux at gmail.com
Tue Oct 9 22:30:30 UTC 2018


The question about the opening direction should be propagated to this draft
proposal regarding pipeline valves
https://wiki.openstreetmap.org/wiki/Proposed_features/Pipeline_valves_proposal

I thought about turn_to_close=clockwise / anticlockwise
Whatever the final answer will be, this definitely have to be the same key
and values on both fire hydrants and any kind of pipeline valves.

The proposal can change at anytime until RFC.
All the best

François

Le mar. 9 oct. 2018 à 23:13, Paul Allen <pla16021 at gmail.com> a écrit :

> On Tue, Oct 9, 2018 at 9:34 PM Viking <viking81 at tin.it> wrote:
>
>>
>> As we did for most of the tags in [0], I would not use fire_hydrant:
>> prefix because we want a slim
>
> database and because  opening:direction=* is (or can be) used for other
>> objects, as doors, taps, etc.
>>
>
> There are differing viewpoints on this.
>
> 1) Minimize database keys by applying them as widely as possible.  So
> opening:direction applies to
> doors, taps, fire hydrants, etc.  Database designers might think this way,
> as might most ordinary
> mappers and most programmers.
>
> 2) Don't re-use keys in this way because you end up with different sets of
> values that apply in
> different situations.  People who program map editors tend to think this
> way.  Each time you use
> opening:direction for a different type of object the programmer has to
> special-case the set of possible
> values based on the associated values in order to populate drop-downs.  If
> you're mapping a
> tap you want the choice of opening:direction to be limited to clockwise
> and counterclockwise and
> not be confused by also seeing inwards and outwards; but for doors you
> want inwards and outwards
> but not clockwise and counterclockwise (unless it's a rotating door).
>
> I can see merits in both viewpoints.  The people who write map editors
> tend to win these arguments
> because most mappers choose from what the editor presents to them. :)
>
> --
> Paul
>
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