Interestingly, &quot;aviation geeks out there supplying the data&quot; are how the FlightAware API you mention gets much of its data:<p><a href="https:&#x2F;&#x2F;flightaware.com&#x2F;adsb&#x2F;coverage#data-coverage" rel="nofollow">https:&#x2F;&#x2F;flightaware.com&#x2F;adsb&#x2F;coverage#data-coverage</a><p><a href="https:&#x2F;&#x2F;flightaware.com&#x2F;adsb&#x2F;piaware&#x2F;" rel="nofollow">https:&#x2F;&#x2F;flightaware.com&#x2F;adsb&#x2F;piaware&#x2F;</a><p>With a bit of promotion your idea could work and in fact... It does!<p><a href="http:&#x2F;&#x2F;www.adsbexchange.com&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.adsbexchange.com&#x2F;</a><p><a href="http:&#x2F;&#x2F;global.adsbexchange.com&#x2F;VirtualRadar&#x2F;desktop.html" rel="nofollow">http:&#x2F;&#x2F;global.adsbexchange.com&#x2F;VirtualRadar&#x2F;desktop.html</a><p>Also, ADS-B rollout isn&#x27;t entirely necessary. It&#x27;s possible to triangulate places with the older Mode-S transponder through MLAT as long as you have enough receivers in the area.