I contacted the owner of the ‘heywhatsthat.com’ site and asked about incorporating the results of his up in the air script directly into dump1090-mut maps. He was extremely helpful and told me of an undocumented API call which he is happy for us to use.
Once you have created a view on his site you can then use the ID of that site in this call:
http://www.heywhatsthat.com/api/upintheair.json?id=myviewid&alts=10000
It will return a JSON variable with the coordinates for the visible polygon at whatever height you request in meters (I’ve asked for 10,000 meters in the example above). As an example, here’s what I get returned for my location at 10,000 meters:
{"refraction":0.25,"rings":{"alt":"10000","points":[32.6099729128549,-97.876768],[32.5901622333547,-97.8276043022589],[32.5673846459684,-97.7793775165884],[32.5655488532864,-97.7307222595661],[32.5863844642117,-97.6801231545666],[32.5947967976855,-97.6298317870926],[32.6139858492118,-97.577642480855],[32.6108792611117,-97.5277710188791],[32.6618229528375,-97.46854839268],[32.6718832866013,-97.414742619004],[32.667236916199,-97.3633611571435],[32.6640859728,-97.3114932008198],[32.6724139533899,-97.2564134608061],[32.6883209188023,-97.1984117962444],[32.711278079929,-97.1370882912527],[32.6997334669719,-97.085524219504],[32.7022761307569,-97.0290093863512],[32.7379290977988,-96.9594011286083],[32.7614361833418,-96.8923034366697],[32.8012092987617,-96.8165141819994],[32.7888400040195,-96.7613377415058],[32.7757616658363,-96.7062890924466],[32.7944433274222,-96.6352669475262],[32.8233999621334,-96.5570081184367],[32.9300910669407,-96.4335874931481],[33.0462957712831,-96.2978267292865],[33.000992495958,-96.2521192427864],[32.9760593673483,-96.1946912976481],[33.0216454089557,-96.090800130452],[32.9942775453606,-96.0330035022767],[32.976128565657,-95.9685979282578],[32.9009131439631,-95.9461154923305],[32.8713842838939,-95.8909724860003],[32.8153975156823,-95.8571101512141],[32.7845411637993,-95.8038373826219],[32.7528870235899,-95.7512497263126],[32.7204455729789,-95.699363773431],[32.6872275373622,-95.6481958269935],[32.6532438851523,-95.5977618965079],[32.6185058232462,-95.5480776927984],[32.5983354115957,-95.4832259107467],[32.5618806119711,-95.4347712868977],[32.524701701086,-95.3871173961451],[32.6172513658613,-95.1889421825222],[32.5763608175978,-95.140260179903],[32.5347436293933,-95.0924755852299],[32.621898401127,-94.8778384652919],[32.5763223251441,-94.8292576499855],[32.6324190021194,-94.6386344165945],[32.5832401579718,-94.5899951029521],[32.6276713482288,-94.4002960677756],[32.5749061316618,-94.3519310715182],[32.5456762935365,-94.2653101145802],[32.4908929668869,-94.2187843805835],[32.4354183449082,-94.1734531026608],[32.3792705342451,-94.1293287449837],[32.3210992622313,-94.0890117667188],[32.2636992692387,-94.0473635377301],[32.2056818638333,-94.006955924262],[32.1470658237839,-93.9677995152791],[31.9995480223953,-94.1257935288164],[31.9427521282225,-94.0908619389264],[31.885439669577,-94.0571440636717],[31.8276289952179,-94.0246483428695],[31.7693385756371,-93.9933827762535],[31.7105869964665,-93.9633549240458],[31.7043918812588,-93.7799030178845],[31.6424398463509,-93.7513969317779],[31.5800688349838,-93.7241996688379],[31.5327801118376,-93.6450930023988],[31.4688278285055,-93.6202549424113],[31.4023546689786,-93.6051265771242],[31.3378217826354,-93.5830155889247],[31.2729664913611,-93.5622531013292],[31.2078091123931,-93.5428427743985],[31.101701063609,-93.7333411539814],[31.0391424189131,-93.7173052534019],[30.9763522910139,-93.7025636993156],[30.9133501691264,-93.6891184715623],[30.8501555680952,-93.6769711364077],[30.7867880222842,-93.6661228494302],[30.7630680995857,-93.2658628729439],[30.6933188970681,-93.2596641384975],[30.6242328676637,-93.244793420535],[30.5542014109277,-93.2425824776252],[30.4843538837352,-93.2380097483372],[30.4147119331317,-93.2241995150438],[30.3446783040539,-93.2151103203326],[30.2744356301004,-93.212989796514],[30.2043901535692,-93.224466866499],[30.1341772283622,-93.2230472647185],[30.0635525036947,-93.2163027075995],[29.9932435746293,-93.2196589412837],[29.924097663556,-93.2384448837089],[29.8531946348673,-93.2353675909833],[29.780870947198,-93.2228539792702],[29.7139028879881,-93.2580724571511],[29.6458338088319,-93.2804615724779],[29.5881574177761,-93.3669916628374],[29.5303166724136,-93.4396710621586],[29.4667221695105,-93.4722472051174],[29.3904286671805,-93.4401289351269],[29.3237874985067,-93.459088007187],[29.2655189278671,-93.5134703614521],[29.2043492137074,-93.5520135444905],[29.1492895425469,-93.6111956036496],[29.0901719300002,-93.6519285896716],[29.0062149277611,-93.6086944997096],[28.956027259458,-93.6783294999947],[28.8930804497676,-93.7057045858548],[28.8123820547657,-93.6830791921383],[28.7321173862997,-93.666592365894],[28.6614827324497,-93.6790560169692],[28.6330748682913,-93.7962789171853],[28.6192343665542,-93.9404236853745],[28.5601634877766,-93.9738553510283],[28.4757963253562,-93.9529821162448],[28.4164836200724,-93.9882692025744],[28.3946614677332,-94.0978525069599],[28.3477083283372,-94.1540481020991],[28.3112286126236,-94.2280497214318],[28.285053022547,-94.3176238047698],[28.2318372700904,-94.3575237574186],[28.2090510411001,-94.447312433906],[28.157928430403,-94.4887934205334],[28.0965276471991,-94.5145912717658],[27.991847496967,-94.4779873847092],[27.8634452549297,-94.4135863442776],[27.7731941786557,-94.4089942597085],[27.7037951227078,-94.435479898286],[27.6599070367323,-94.4959488367183],[27.6061460217448,-94.5436591787904],[27.5471736266161,-94.5854694278778],[27.4747159219384,-94.6125934145953],[27.442407809267,-94.6859127124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It is then fairly straightforward to plot those coordinates as an overlay on the map (the red polygon is the 10,000 ft view, i.e.3048 meters).
http://gsak.net/stats/screenshots/2015-11-03_10-40-53.png
He also told me how you can change the refraction value that his script uses to one more suitable for RF. If you enter his site through the URL: heywhatsthat.com/?refraction=1 then, when you create a new view, you are given the option to set the refraction value. He suggests using 0.25 instead of the default 0.14 which is used for visible light.
