[OSM-talk] proposed bot edit for surface=granite, surface=marble and similar

[Martin Koppenhoefer]

Am Mi., 15. März 2023 um 14:01 Uhr schrieb Mateusz Konieczny via talk <
talk at openstreetmap.org>:

>
>
>
> Mar 15, 2023, 10:21 by dieterdreist at gmail.com:
>
> I'd prefer "surface:material" compared to "material", it is in modest use
> (800) https://taginfo.openstreetmap.org/keys/surface%3Amaterial
> because the "highway" represents not just the surface.
>
> material represents primary material of object and surface of
> road/path/square
> seems to fit here well.
>
> What would be benefit for surface:material over material anyway?
> Which other tags would be added that are infeasible with material?
>


not sure, maybe bridge? currently there are 10622 instances of material and
surface on the same object, the combination or surface with
surface:material (or surface.material or surface_material) is used 2200
times.
 https://taginfo.openstreetmap.org/keys/surface#combinations



If someone really wants they can add surface:curb:left=granite
>


this is where I think it could be subtagged,
material=stone  (180.000 uses)
stone=granite/sandstone/andesite/limestone/marble (minor organic use)
https://taginfo.openstreetmap.org/keys/stone

surface is not just about a material (as is granite), it is about the kind
of shape/pieces, unhewn_cobblestone, paving_stones, compacted, grass_paver,
cobblestone, etc.
There are lots of different stones in the world, even more if you look at
the specific subtype, IMHO these should not be used as individual values in
the first order ("material")
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