NOTE TO UPLOADERS:
Merge overlapping nodes from the powerline_cl layer as needed. (and existing map features too)
pylon_pnt contains only major pylons as defined in the OSM description. Corresponding powerline_cl have support type = 'pylon'
HB: do the nodes correspond exactly? (& thus need to be merged)
RP: can we include the orientation as well? LINZ:orientation. otherwise great
HB: orientation added
HB 25 Aug 2012: orientation no longer exists; ignore. Otherwise simple enough, looks good to me but mind the merging.
Glen wrote on the ML 7 Sep 2012:Agreed power=tower.
Approved for the mainland.