W dniu 12.09.2016 15:31, Dave F napisał(a):
I'd say use primary_link as it involves less typing, but both are
equal in meaning & standing.
We could tag "any tag we like", but while the meaning may be the same,
in practice only one is used and the other one is not.
That's the first class - you can do it without fatigue by default, but
you may add details and exceptions (!) if you need. The second class is
not about something being just impossible, but it's less convenient and
more error prone: more typing and more assumptions you have to express
when you just want to tell one general thing.
When I want to tag corridor it's easier to express it by using its name
than try to define "what the corridor really is - using terms of OSM
tagging practice?". Defining is hard and we can get few different
schemes for one typical element.
No: You know cemetery & park paths are cemetery & park paths because
they're in a cemetery or park. (OSM is geospatially aware - see
discussions in Talk about is_in tag)
You can also assume that a service road on the parking is a "parking
aisle", but we tag it anyway and it's a common practice (2.2 millions of
uses). We also tag the residential area, even when you have residential
buildings tagged. And you can add a road property lit=* even if we have
lamps around it and we may tag them as working.
Why? Because it's a different level of abstraction.
--
"To co ludzie zwą marskością wątroby/ Tak naprawdę jest śmiercią z
tęsknoty" [Afro Kolektyw]
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