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.
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. 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@openstreetmap.org >> https://lists.openstreetmap.org/listinfo/tagging > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging -- rwe...@averillpark.net Averill Park Networking - GIS & IT Consulting OpenStreetMap - PostgreSQL - Linux Java - Web Applications - Search _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging