[Tagging] Power transmission refinement proposal

[Ole Nielsen]

On 11/02/2013 19:53, Janko Mihelić wrote:
> 2013/2/11 Martin Koppenhoefer <dieterdreist at gmail.com
> <mailto:dieterdreist at gmail.com>>
>
>
>     According to the proposal we would then need to know the exact voltage
>     in order to distinguish between the various sizes of substations
>
>
> We could make a little tool that suggests voltages by the powerlines
> that end up near a substation. That would solve a majority of big
> substations.

Well, that seems like overkill to me. A manual inspection of the lines 
terminating at the substation should be sufficient (assuming their 
voltages have been tagged).

I have noticed that you can quite easy detect the voltages handled in 
the substation by measuring the distances between busbars (Bing imagery 
is mostly sufficient detailed to allow this). It requires that you know 
the standard voltages used in the given area but is otherwise a pretty 
reliable way of distinguishing voltages. I'm thinking about writing a 
wiki page explaining how to detect voltages and other features of power 
grids from aerial imagery.

Ole / polderrunner