[Tagging] Fixed position GPS receivers

[John Smith]

Here's a sample generated from NASA site log files:

<node id='-1' visible='true' lat='44.463944444444' lon='26.125738888889'>
<tag k='fixme' v='not_reviewed' />
<tag k='man_made' v='monitoring_station' />
<tag k='monitoring:gps' v='yes' />
<tag k='monitoring:glonass' v='yes' />
<tag k='iers_domes_number' v='11401M001' />
<tag k='antenna' v='LEIAT504GG      LEIS' />
<tag k='receiver' v='LEICA GRX1200GGPRO' />
<tag k='name' v='Bucuresti / Romania' />
<tag k='ele' v='143.2' />
<tag k='source:url'
v='http://igscb.jpl.nasa.gov/igscb/station/log/bucu_20100503.log' />
</node>

Just to make things more interesting, the lat/lon given for some/all
sites are in country or region specific datums, eg Australian
locations use GDA94, but the site log file can't automatically be
parsed for which datum is used.