[talk-au] Broadcast tower locations

[John Smith]

On 18 May 2010 13:00, Roy Wallace <waldo000000 at gmail.com> wrote:
> Relations should only be used for "groups of objects in which each
> object may take on a specific role".

Maybe so, but it's often the best way to tag things at present since
you can't have duplicate keys, but in this case you are grouping a
bunch of antenna to a tower...

> I think the problem arises because it's ambiguous as to what you are
> actually mapping. If mapping the *tower* (it seems you are, given
> "<tag k='man_made' v='tower' />"), then I think *transponder*
> information should not be shoehorned into the same element.

There is 2 pieces of information, first the tower itself, and second
the transponder/transmitter information both have value.

> Alternatively, if you think the *transponder* information really is a
> characteristic of the *tower*, another option is to use
> communications_transponder:frequency=0.729;0.891. Or, you could
> instead do something like
> communications_transponder=0.729_50000W_AM_vertical_omni;... etc.

That doesn't help any more than listing out the information in
individual sub-tags... In fact this makes things much worst since you
can't search individual aspects of each transponder/transmitter...
This information could be used to plan trips and roughly know where
each radio station covers based on the output and frequency, if you
then combine digitial elevation information you could have a pretty
good idea of ideal coverage...