[talk-au] Broadcast tower locations

[John Smith]

The current tagging scheme for doing transponders don't seem to take
multiple transponders on the same tower:

<node id='-2' visible='true' lat='-35.106861110778' lon='138.51827222222'>
<tag k='fixme' v='not_reviewed' />
<tag k='acma.gov.au:site_id' v='23234' />
<tag k='acma.gov.au:licence_id' v='1198409' />
<tag k='name' v='Broadcast Site Sherriffs Road REYNELLA' />
<tag k='man_made' v='tower' />
<tag k='tower:type' v='communication' />
<tag k='height' v='168' />
<tag k='communications_transponder:frequency' v='0.729' />
<tag k='communications_transponder:power' v='50000' />
<tag k='communications_transponder:modulation' v='AM' />
<tag k='communications_transponder:polarisation' v='vertical' />
<tag k='communications_transponder:antenna_type' v='omnidirectional' />
<tag k='source' v='data.australia.gov.au' />
<tag k='attributation' v='Australian Communications and Media
Authority, Register of Radiocommunications Licences' />
<tag k='attributation:url' v='http://www.acma.gov.au/WEB/STANDARD/pc=PC_9150' />
</node>
<node id='-3' visible='true' lat='-35.106861110778' lon='138.51827222222'>
<tag k='fixme' v='not_reviewed' />
<tag k='acma.gov.au:site_id' v='23234' />
<tag k='acma.gov.au:licence_id' v='1198410' />
<tag k='name' v='Broadcast Site Sherriffs Road REYNELLA' />
<tag k='man_made' v='tower' />
<tag k='tower:type' v='communication' />
<tag k='height' v='168' />
<tag k='communications_transponder:frequency' v='0.891' />
<tag k='communications_transponder:power' v='50000' />
<tag k='communications_transponder:modulation' v='AM' />
<tag k='communications_transponder:polarisation' v='vertical' />
<tag k='communications_transponder:antenna_type' v='omnidirectional' />
<tag k='source' v='data.australia.gov.au' />
<tag k='attributation' v='Australian Communications and Media
Authority, Register of Radiocommunications Licences' />
<tag k='attributation:url' v='http://www.acma.gov.au/WEB/STANDARD/pc=PC_9150' />
</node>

The lat/lon is approximations only, since the ACMA still uses AGD66
instead of WGS84 or DGA94, and there is no simple formula to shift
locations, but should be closeish.