[Tagging] What's a power=station?

[Alan Mintz]

I downloaded from TagWatch NA a couple days ago, a list of power=station 
nodes and closed ways. I then audited each feature in southern CA (36 of 
them) against imagery and a list of known SCE substations and generating 
stations. Here are the results:

Closed ways:
- 1 unknown (unable to determine from imagery or list)
- 1 is the terminus of a HVDC line, which is maybe a special case
- 10 are generating stations or switchyards adjacent to and part of them 
(incorrect usage)
- 16 are substations (correct usage)
- There are clearly many more substations that are not tagged (or not 
tagged power-station anyway), but probably not many more generating stations.

Standalone nodes:
- 1 unknown
- 3 are generating stations that are not otherwise tagged (incorrect usage)
- 3 are generating stations that also have closed ways (included in the 
Closed ways category above) surrounding them (incorrect usage)
- 4 are substations (correct usage)


So, it seems that there is both correct and incorrect usage in similar 
amounts so far. I hope to report back with power=sub_station and 
power=generator, as well as a count of editing users, soon.

--
Alan Mintz <Alan_Mintz+OSM at Earthlink.net>