Interestingly, "aviation geeks out there supplying the data" are how the FlightAware API you mention gets much of its data: https://flightaware.com/adsb/covera

Interestingly, "aviation geeks out there supplying the data" are how the FlightAware API you mention gets much of its data: https://flightaware.com/adsb/coverage#data-coverage https://flightaware.com/adsb/coverage#data-coverage https://flightaware.com/adsb/piaware/ https://flightaware.com/adsb/piaware/ With a bit of promotion your idea could work and in fact... It does! http://www.adsbexchange.com/ http://www.adsbexchange.com/ http://global.adsbexchange.com/VirtualRadar/desktop.html http://global.adsbexchange.com/VirtualRadar/desktop.html Also, ADS-B rollout isn't entirely necessary. It's possible to triangulate places with the older Mode-S transponder through MLAT as long as you have enough receivers in the area.