[Tagging] fire_hydrant extensions proposal

Georg Feddern osm at bavarianmallet.de
Mon Mar 11 14:01:20 UTC 2013

Am 11.03.2013 13:29, schrieb Richard Welty:
> On 3/11/13 7:25 AM, Andreas Labres wrote:
>> Please keep in mind, there already a rather big list of possible tags:
>> http://wiki.openstreetmap.org/wiki/DE:Tag:emergency%3Dfire_hydrant
>> (only in German) and what the OpenFireMap displays (the diameter):
>> http://openfiremap.org/?zoom=17&lat=48.11435&lon=16.31743

> 3) water main diameter (not hydrant diameter)
> internal hydrant diameter isn't going to play in the US, nor is pressure
> in bar, hence the proposal for extending the tagging system.

fire_hydrant:main_diameter is the same as fire_hydrant:diameter - at 
least in the current tagging usage and 'mappers meaning'.

fire_hydrant:diameter is used for the _main_ _pipeline_ diameter, where 
the hydrant is fed from - as this is indicating the possible value of 
the water supply. (In theory the pressure is normalized ... in practice, 
well ...)

Sure, this is a bit misleading ... it was developed from a german point 
of view regarding the signs and a short-as-possible key ...

The hydrant pipe inner diameter is not tagged yet - afaik.
In Germany the interfaces are standardized anyway - and the 
(underground) standpipe diameter may possibly vary (50, 80, 100), as it 
is a movable part from the fire brigade.


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