On 30/03/2023 18:13, NKA mapper wrote:
tor. 30. mar. 2023 kl. 18:14 skrev Andy Townsend <ajt1...@gmail.com>:
How do I know if an "amenity=charging_station" in the OSM data is
a "single charge point" or a "group of chargers"?
The intention is to not have a difference. Both a single charger
location and a multi-charger location is a place where you could
charge your vehicle, and the proposal is to map them the same way.
This is similar to a fuel station, where I would tag one single pump,
typically at a rural location, as amenity=fuel.
That would be a problem, as trying to use the same tag for different
physical objects always is in OSM. If I
gis=> select count(*) from [some database table] where amenity =
'charging_station';
count
-------
267
(1 row)
How do I know what I am counting? How do I count just "single charge
points"? How do I count "groups of chargers"
Of course tags like capacity and socket would give indications.
If tagged, but plenty exist without those: https://overpass-turbo.eu/s/1ta8
And if amenity=charging_station is tagged as an area around a number
of charge points, that would be a group.
That'd need to be a spatially-aware query, and I wouldn't assume that
data consumers can easily do that. At the place where I detect charging
stations I don't have that capability:
https://github.com/SomeoneElseOSM/SomeoneElse-style/blob/master/style.lua#L1492
.
If the same tag must be used for both, the only way to tell "single
charge point" from "group of chargers" is to have a tag that is set to
indicate which is which. If "newtag=single" it means it's a single
charge point, if "newtag=group" it's a group, and if "newtag" is not
set, we don't yet know, and need to encourage local mappers to add the tag.
Recycling centres are similar, and I handle them like this:
https://github.com/SomeoneElseOSM/SomeoneElse-style/blob/master/style.lua#L1648
, though in this case the extra tag ("recycling_type=centre" ), if
unset, suggests that we're just talking about a recycling bin not a
recycling centre.
Best Regards,
Andy
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