[Tagging] fire hydrants

Robert Koch robert.koch at loggia.at
Thu Jun 15 12:38:06 UTC 2017

Hello Richard,

On 2017-06-15 01:32, Richard Welty wrote:
> an american usage note:
> the "standard" hydrant in the US has 2 x 2.5" hose connections
> and 1 x 4.5" pumper connection. other sizes have existed in the
> past.
Which coupling-type do you use? NST

If so one would describe this hydrant as:

Open: How do we reflect the unit? Millimetres won't work for the US.
> the wrench required for the bolt at the top of a dry hydrant may vary,
> pentagonal bolts are most common but others have been used.
> this is something that a mapper can observe, and something that
> a fireman cares about.
There is not yet a tag for this. In Austria a typical wrench looks like
this: http://i.ebayimg.com/images/i/251745653405-0-1/s-l1000.jpg
The left side is used to open the bolt at the top, while the right side
can be used to open the cap of the hose couplings.

Best regards,
> On 6/14/17 6:52 PM, Robert Koch wrote:
>> Hello Alberto,
>> I like your remarks and would like to work together to improve things.
>> On 2017-06-14 19:06, Viking wrote:
>>>> in OsmHydrant [1] there is already fire_hydrant:coupling_type with various values from Storz to Barcelona
>>>> (https://taginfo.openstreetmap.org/keys/fire_hydrant:coupling_type). Then there is fire_hydrant:couplings to complement that, describing the > actual connectors: https://taginfo.openstreetmap.org/keys/fire_hydrant%3Acouplings
>>>> This implementation might not be the best for various reasons, but we could consolidate its structure/values if needed.
>>>> [1] https://www.osmhydrant.org/en/
>>> It is a bad implementation: first of all because there is no reference on hydrants wiki page (and indeed I didn't know it) and consequentely there is a wide range of heterogeneous values that are almost useless for automatic data search.
>>> By the way, let's try to improve these existing tags.
>>> fire_hydrant:coupling_type indicates the standard (UNI, Storz,...)
>>> fire_hydrant:couplings indicates the number and diameters.
>>> Right?
>> Right!
>>> First question: is it possible that the same hydrant has different coupling types, for example Storz and UNI? I know that in Italy, where I work as fireman, this is not possible, so a single value in fire_hydrant:coupling_type is enough.
>> In Austria I've only seen hydrants with one connector type (mostly Storz). S
>>> Second question: how would you indicate the number of couplings? For example an hydrant with two UNI 45 mm couplings and one UNI 70 mm coupling would be:
>>> fire_hydrant:coupling_type=UNI
>>> fire_hydrant:couplings=45;45;70
>>> OR
>>> fire_hydrant:couplings=2 x 45;70
>>> OR...?
>> So far it was really up to the contributor on OsmHydrant but the
>> recommended way in this case have been so far:
>> fire_hydrant:couplings=2x45/1x70
>> Before going on, I've to explain the rationale behind using that scheme
>> first. In Austria we're using character A for 110mm diameter, B for for
>> 75mm and C for either 52 (or 42). In this case it looks easily readable:
>> "1B/2C" or "1A/2B".
>> When it comes to "2x45/1x70" I totally agree that "45;45;70" is much
>> better. Back in time when doing the implementation for OsmHydrant, I
>> didn't know about using the semicolon to split values, but I like it
>> more than the forward slash.
>> Coming back to the Austrian "1A/2B" I would additionally allow using
>> these characters instead of diameter values as well resulting in: "A;B;B"
>> If the proposal is accepted I'd propose migrating all values
>> automatically and changing OsmHydrant. Your scheme with repeating the
>> diameter is much better readable & parse-able by humans & tools.
>> Best regards,
>> Robert
>>> I would prefer 45;45;70 because it's more explicit and less prone to errors.
>>> The use of semicolons to separate different values is commonly accepted on the wiki.
>>> Alberto
>>> ---
>>> Questa e-mail รจ stata controllata per individuare virus con Avast antivirus.
>>> https://www.avast.com/antivirus
>>> _______________________________________________
>>> Tagging mailing list
>>> Tagging at openstreetmap.org
>>> https://lists.openstreetmap.org/listinfo/tagging
>> _______________________________________________
>> Tagging mailing list
>> Tagging at openstreetmap.org
>> https://lists.openstreetmap.org/listinfo/tagging

More information about the Tagging mailing list