I think it's easy for a mapper to determine if a station is a
bottom_station or a upper_station even if he doesn't know the exact
elevation.
Am 13.08.2020 um 14:28 schrieb Colin Smale:
On 2020-08-13 14:07, dktue wrote:
I think that it's quite hard for data consumers (again: think of an
overpass-query to find all mid-stations) to determine which role a
station has. Like Martin said: Why not just solve the (huge!) special
case of mountain aerialways where we really have one bottom_station,
zero or more mid_station and one upper_station?
Because cases that don't obviously fit that model will remain
untagged, or get subjectively/wrongly tagged with this model or some
other tags. There are many cases of arialways that start and finish at
roughly the same level. Do they have two bottom stations, or two top
stations, or do you force someone to make a judgement call as to which
is slightly higher than the other?
If you want to find all mid-stations, do you want to find ALL
mid-stations or are you happy with MOST or MANY or SOME?
Modelling reality is all about what to leave out. If top-stations,
mid-stations and bottom-stations can be reliably derived from
elevation and topology then there is no need to add a more explicit tag.
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