And here is something about the reliability of ADSB (from a RF hack site):
Unusual landing site
First, what a brilliant concept you have there. Really nice.
Second. Was watching QF 0613, VH-VZU this morning, 2304 at around 0725 landing on RWY 34. The Flight Deck view (also really good, the MS Flight Sim guys will love it) showed it was landing at YSSY but on Google Earth it appeared to land next to Gundaroo Rd about 9nm south of the Hume Hwy.
I hope this is the sort of feedback you are looking for. Hopefully you will get this coding issue sorted and you produce an outstanding aviation app. Are you going to do one for YMML since it is a 24 hour airport, unlike YSSY with its curfew. ;-)
reply
Mon, 23/04/2012 - 11:00 — balint
RE: Unusual landing site
Thanks for testing it out!
This is an interesting phenomenon: I have spent a great deal of time adding sanity checks so that corrupted position reports do not throw out airframe tracks. If an ADS-B frame is valid though, it is processed as-is. There are, in fact, a number of broken transponders, which result in very odd tracks, such as the one you saw. I have verified this with other receivers/services too - so I think chances are they're sending bad data (and AvMap is interpreting it as it ought to).
Some people have kindly offered a feed for YMML, so it will hopefully be on the map soon!