PM sent with link to a KML file from yesterday. I agree, probably no data lost as the raw records for an example I looked at show the correct GPS, but it gets triangulated to 0,0. Interesting puzzle! I think the way the data stops at the longitude line each side of 173E is a clue. The networks I fou...

In the far north west of New Zealand (between Kerikeri, Kaitaia and Dargaville), there are no networks shown on the map at all, even in urban areas. Networks are shown either side of this area, which appears to be roughly the 173 degrees east area (173.0000-173.9999 E), although 173 E much further s...