[Tagging] power=tower or pole?

[Alan Mintz]

At 2010-09-07 10:27, Nathan Edgars II wrote:
>On Tue, Sep 7, 2010 at 9:10 AM, Alan Mintz <Alan_Mintz+OSM at earthlink.net> 
>wrote:
> > tower_type=a_frame :
> > http://sites.google.com/site/am909geo/osm-1/power_a_frame.jpg Usually seen
> > as the input and output interfaces of a substation. The example shows 
> two of
> > them at right angles to each other. They are made of two identical A-shaped
> > structures with a single pole across the apex of them, similar to a
> > sawhorse. The insulators are spaced evenly across that pole between the
> > A-shaped sides. Additional structures are added sideways to accommodate 
> more
> > circuits.
>http://wiki.openstreetmap.org/wiki/Power_lines_in_OSM#inside_power_stations
>appears to call these switches. I've been tagging each node where a
>line ends in a substation as power=transformer, since I don't map the
>individual parts of a substation, and the transformer is the most
>important part.

The particular structures I showed are not switches. They simply support 
the insulators that support the incoming/outgoing cables and spread them 
from the vertical orientation in which they are carried on multi-circuit 
towers to the horizontal orientation used in the substation. Some 
open-frame switches/fuses may be somewhat similar in appearance, though 
they are generally closer to the ground and more complex-looking. The 
A-frames that I describe are easy to spot at the external interfaces to the 
substation.

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