Hi François,
the combination of electricity:grid=yes with either electricity:origin=*
or electricity:grid:origin=* would point to the origin being only about
financial flows as advertised on-the-ground.
For the purpose of filtering out amenities, e.g. charging stations, that
only use 'green' electricity it is still useful to tag
electricity:origin=* or electricity:generator:origin=* in combination
with electricity:generator=yes. Alternatively, there would need to be a
tagged relation to the specific generator and the end users it supplies
which would be considerably harder to query and many OSM editers seem to
find relations confusing. Therefore, I think the slight bit of
redundancy is useful to explicitly tag this on the amenity. Furthermore,
the word 'origin' is used, not only to avoid two tags with very similar
meanings that can be easily distinguished by combination with the
infrastructure tag, but also since 'electricity:source' would then have
a double meaning with 'the survey/map/place where the knowledge of the
electricity was obtained', which is apparently a problem for some other
tags using source as a keyword.
Cheers,
Lukas
On 14.11.20 17:15, François Lacombe wrote:
Hi Lukas
Le jeu. 12 nov. 2020 à 00:48, Lukas Richert <[email protected]
<mailto:[email protected]>> a écrit :
electricity:generator:origin
<https://wiki.openstreetmap.org/w/index.php?title=Key:electricity:generator:origin&action=edit&redlink=1>=solar
I didn't get in details what leads to this association between local
supply with a generator and origin and it's not correct.
Origin is only financial/market flows (in association with according
communication claiming for environmental benefits). A particular trade
to pay for a certain kind of electricity production.
When electricity is locally produced, for a given building, it's not
about origin, it's only about source.
As we already define the source on the generator itself, this would be
redundant to explicitly define it on the building as well.
"Origin" is a term that should only be related with grid power supply
as everyone consumes the same electricity but can pay for particular
origins.
All the best
François
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