Here's a close-up of NZ
Wellington also occasionally gets overflights from Aus to Sth America, and Dunedin & Invercargil get overflights of A320's & C0-17's from Christchurch to Antarctica that have caused at least 1 chemtrail letter to the editor of the ODT resulting in this piece in reply!
At least some of ANZ's 737's have ADSB - right now I can see NGR on ANZ421 (Akl-Wlg) about 20-30 miles NNW of New Plymouth at 35,575 ft
There seem to be some bugs remaining in the data or their interpolation - quite a few routes end at the double zero point in Gulf of Guinea.
Not that I'm aware of. At some point I'd like to add the capability to take a file of airport code pairs (LHR,LAX) and plot great circles, that way you could generate a (somewhat idealized) route map for various places.
Here's something I've long suspected - there's hardly any overflights in Hawaii, it's about 99.5% incoming and outgoing traffic. So it's very unlikely anyone there is seeing lots of contrails directly overhead
I'm back in southern Baja now and staggered by the volume of traffic compared to previous years. I remember first being here 19 years ago and being annoyed because one day one plane flew over the mountains I was camping in - now there are spells when it's almost constant. Interesting that if the planes here did leave contrails and I was so inclined, probably what I'd be remembering was chemtrail-free skies in the old days, and tons of spraying now.What an interesting thread. My main base is Baja California, Mexico, near San Jose del Cabo. I'd always assumed there weren't contrails because of the level of humidity and lack of traffic - but perhaps there aren't any flights above 30,000 feet either?