31:T4e8,md` ## Matching and Styling Features 🔍🎨 Features are fetched from [Nextzen vector tiles](https://developers.nextzen.org/) with the [Tilezen](https://github.com/tilezen/vector-datasource) schema. To find and pull out the features we want, we define a set of filters and corresponding style functions. Each filter has: - The name of a layer to match in the tile (\`roads\`) - A feature property name to match (often derived from OSM tags) (\`kind\`) - One or more property values to match (\`aeroway\`) - Styling properties such as \`stroke\` and \`fill\` that are applied when these features are drawn The filters below match a combination of airport features like runways, taxiways, etc. (\`roads\` with \`kind=aeroway\`), buildings within the airport polygon (\`landuse_kind=aerodrome\`), and roads that pass through the airport, both for dropoff/pikcup and internal service roads. Note that because Tilezen tiles perform additional clipping of roads against landuse polygons like parks, airports, universties and hospitals, we get a nice "clean" look for any roads passing in or out of the airport -- only the portions of roads that are inside the airport boundary are rendered. These clipped features have a special \`landuse_kind\` property. `32:T753,md` ## Fetching the Tiles 🗺🧺 But how do we find the tiles we need? Sometimes we have a bounding box for our area of interest, and can simply calculate the tiles covering that area. But in the case of these airports, we only have a single, general **point location** (where a POI marker or name label would often be rendered). The solution used here is to search the tiles around the center point for relevant features, expanding the search area as needed: - Pick a fixed tile zoom to search in. In this case, it's \`${tileZoom}\`, because that's the highest level of detail for these Tilezen tiles. - Start with the tile (\`${startTile[0]}/${startTile[1]}/${startTile[2]}\`) containing the center point (\`[${centerPoint[0]}, ${centerPoint[1]}]\`). - Run the matching function defined above. - If any matching features were found in the tile, **expand the search area** by one tile in each direction (left, right, top, bottom). - Keep requesting tiles, expanding the search area until no matching features are found (or until a maximum tile area has been searched, to prevent runaway processes). This technique relies on larger "logical" features, like an airport, that are made up of many smaller features which are loosely identifiable by a series of tag/property values, and generally unlikely to be near others like it, e.g. airports tend to be isolated enough that you're usually not going to come across another airport beyond the intended one while searching tiles. This approach could also be applied to things like universities, but would be more likely to run into issues with adjacent/nearby universities in academic-dense areas! It's also not always fast -- it can take a few seconds to find all the tiles for large airports. But, it's a quick and dirty way to mostly find the area you're interested in, when you only have a single point to start with. `33:T67c,async function getFeaturesNearTiles(minTile, maxTile, matchFunc, features = [], level = 0, maxLevel = 6) { async function getTile([x, y, z]) { console.log('tile', x, y, z); const url = `https://tile.nextzen.org/tilezen/vector/v1/512/all/${z}/${x}/${y}.json?api_key=${nextzenAPIKey}`; const layers = await fetch(url).then(r => r.json()); const matchedFeatures = matchFunc(layers); if (matchedFeatures.length > 0) { features.push(...matchedFeatures); return true; } return false; } let tiles = []; let featureCount = features.length; const z = minTile[2]; if (minTile[0] === maxTile[0] && minTile[1] === maxTile[1]) { tiles.push(getTile(minTile)); } else { for (let x = minTile[0]; x <= maxTile[0]; x++) { tiles.push(getTile([x, minTile[1], z])); // top row tiles.push(getTile([x, maxTile[1], z])); // bottom row } for (let y = minTile[1] + 1; y <= maxTile[1] - 1; y++) { tiles.push(getTile([minTile[0], y, z])); // left column tiles.push(getTile([maxTile[0], y, z])); // right column } } await Promise.all(tiles); // wait for all tile fetches to finish // if any new features were found, expand search one level if (features.length > featureCount) { minTile = [minTile[0] - 1, minTile[1] - 1, minTile[2]]; maxTile = [maxTile[0] + 1, maxTile[1] + 1, maxTile[2]]; if (level < maxLevel) { console.log('expand', minTile, maxTile, features); await getFeaturesNearTiles(minTile, maxTile, matchFunc, features, level + 1); } else { console.log('hit max expand level'); } } return features; }34:Te27d,airports = [ [ "Aalborg Airport", "AAL", 9.84924316406, 57.0927589138 ], [ "Albuquerque International Sunport", "ABQ", -106.609001, 35.040199 ], [ "Nnamdi Azikiwe International Airport", "ABV", 7.263169765472412, 9.006790161132812 ], [ "Aberdeen Dyce Airport", "ABZ", -2.197779893875122, 57.201900482177734 ], [ "General Juan N Alvarez International Airport", "ACA", -99.75399780273438, 16.757099151611328 ], [ "Kotoka International Airport", "ACC", -0.16678600013256073, 5.605189800262451 ], [ "Adana Airport", "ADA", 35.280399322499996, 36.9822006226 ], [ "Adnan Menderes International Airport", "ADB", 27.156999588, 38.2924003601 ], [ "Addis Ababa Bole International Airport", "ADD", 38.799301147499996, 8.97789001465 ], [ "Adelaide International Airport", "ADL", 138.531006, -34.945 ], [ "Joint Base Andrews", "ADW", -76.866997, 38.810799 ], [ "Sochi International Airport", "AER", 39.9566, 43.449902 ], [ "Fort Worth Alliance Airport", "AFW", -97.31880187990001, 32.9875984192 ], [ "Málaga Airport", "AGP", -4.499110221862793, 36.67490005493164 ], [ "Augusta Regional At Bush Field", "AGS", -81.9645004272461, 33.36989974975586 ], [ "Auckland International Airport", "AKL", 174.792007446, -37.008098602299995 ], [ "RAF Akrotiri", "AKT", 32.9879, 34.590401 ], [ "Almaty Airport", "ALA", 77.04049682617188, 43.35210037231445 ], [ "Alicante International Airport", "ALC", -0.5581560134887695, 38.28219985961914 ], [ "Houari Boumediene Airport", "ALG", 3.215409994125366, 36.691001892089844 ], [ "Aleppo International Airport", "ALP", 37.22439956665039, 36.18069839477539 ], [ "Rick Husband Amarillo International Airport", "AMA", -101.706001, 35.219398 ], [ "Queen Alia International Airport", "AMM", 35.9931983948, 31.7226009369 ], [ "Amsterdam Airport Schiphol", "AMS", 4.76389, 52.308601 ], [ "Ted Stevens Anchorage International Airport", "ANC", -149.99600219726562, 61.174400329589844 ], [ "Stockholm-Arlanda Airport", "ARN", 17.918600082397, 59.651901245117 ], [ "Ashgabat International Airport", "ASB", 58.361, 37.986801 ], [ "Eleftherios Venizelos International Airport", "ATH", 23.9444999695, 37.9364013672 ], [ "Hartsfield Jackson Atlanta International Airport", "ATL", -84.428101, 33.6367 ], [ "Sri Guru Ram Dass Jee International Airport", "ATQ", 74.7973022461, 31.7096004486 ], [ "Abu Dhabi International Airport", "AUH", 54.651100158691406, 24.433000564575195 ], [ "Austin Bergstrom International Airport", "AUS", -97.6698989868164, 30.194499969482422 ], [ "Asheville Regional Airport", "AVL", -82.54180145263672, 35.43619918823242 ], [ "Antalya International Airport", "AYT", 30.800501, 36.898701 ], [ "Beale Air Force Base", "BAB", -121.43699646, 39.136100769 ], [ "Barksdale Air Force Base", "BAD", -93.6626968384, 32.5018005371 ], [ "Bahrain International Airport", "BAH", 50.63359832763672, 26.27079963684082 ], [ "Barcelona International Airport", "BCN", 2.07846, 41.2971 ], [ "Bradley International Airport", "BDL", -72.68319702149999, 41.9388999939 ], [ "Belgrade Nikola Tesla Airport", "BEG", 20.3090991974, 44.8184013367 ], [ "Val de Cans/Júlio Cezar Ribeiro International Airport", "BEL", -48.4762992859, -1.3792500495900002 ], [ "Beirut Rafic Hariri International Airport", "BEY", 35.488399505615234, 33.820899963378906 ], [ "Boeing Field King County International Airport", "BFI", -122.302001953125, 47.529998779296875 ], [ "Belfast International Airport", "BFS", -6.2158298492399995, 54.6575012207 ], [ "Bergen Airport Flesland", "BGO", 5.218140125, 60.29339981 ], [ "Bangor International Airport", "BGR", -68.8281021118164, 44.80739974975586 ], [ "Baghdad International Airport", "BGW", 44.2346000671, 33.262500762900004 ], [ "Il Caravaggio International Airport", "BGY", 9.70417, 45.673901 ], [ "George Best Belfast City Airport", "BHD", -5.872499942779541, 54.618099212646484 ], [ "Birmingham-Shuttlesworth International Airport", "BHM", -86.75350189, 33.56290054 ], [ "Birmingham International Airport", "BHX", -1.74802994728, 52.453899383499994 ], [ "Billings Logan International Airport", "BIL", -108.54299926757812, 45.807701110839844 ], [ "Milas Bodrum International Airport", "BJV", 27.6643009186, 37.25059890749999 ], [ "Suvarnabhumi Airport", "BKK", 100.74700164794922, 13.681099891662598 ], [ "Modibo Keita International Airport", "BKO", -7.94994, 12.5335 ], [ "General José Antonio Anzoategui International Airport", "BLA", -64.692222, 10.111111 ], [ "Billund Airport", "BLL", 9.15178012848, 55.7402992249 ], [ "Bologna Guglielmo Marconi Airport", "BLQ", 11.2887, 44.5354 ], [ "Kempegowda International Airport", "BLR", 77.706299, 13.1979 ], [ "Scott AFB/Midamerica Airport", "BLV", -89.835197, 38.5452 ], [ "Central Illinois Regional Airport at Bloomington-Normal", "BMI", -88.91590118, 40.47710037 ], [ "Nashville International Airport", "BNA", -86.6781997680664, 36.1245002746582 ], [ "Brisbane International Airport", "BNE", 153.11700439453125, -27.384199142456055 ], [ "Bordeaux-Mérignac Airport", "BOD", -0.715556025505, 44.828300476100004 ], [ "El Dorado International Airport", "BOG", -74.1469, 4.70159 ], [ "Bournemouth Airport", "BOH", -1.8424999713897705, 50.779998779296875 ], [ "Boise Air Terminal/Gowen Field", "BOI", -116.223, 43.5644 ], [ "Burgas Airport", "BOJ", 27.515199661254883, 42.56959915161133 ], [ "Chhatrapati Shivaji International Airport", "BOM", 72.8678970337, 19.0886993408 ], [ "Bodø Airport", "BOO", 14.365300178527832, 67.26920318603516 ], [ "General Edward Lawrence Logan International Airport", "BOS", -71.00520325, 42.36429977 ], [ "Bremen Airport", "BRE", 8.78666973114, 53.0475006104 ], [ "Bari Karol Wojtyła Airport", "BRI", 16.760599, 41.138901 ], [ "Bristol Airport", "BRS", -2.71909, 51.382702 ], [ "Brussels Airport", "BRU", 4.48443984985, 50.901401519800004 ], [ "Presidente Juscelino Kubistschek International Airport", "BSB", -47.920833587646484, -15.86916732788086 ], [ "EuroAirport Basel-Mulhouse-Freiburg Airport", "BSL", 7.5291667, 47.59 ], [ "Basrah International Airport", "BSR", 47.66210174560547, 30.549100875854492 ], [ "M. R. Štefánik Airport", "BTS", 17.21269989013672, 48.17020034790039 ], [ "Budapest Liszt Ferenc International Airport", "BUD", 19.261093, 47.42976 ], [ "Buffalo Niagara International Airport", "BUF", -78.73220062, 42.94049835 ], [ "Baltimore/Washington International Thurgood Marshall Airport", "BWI", -76.668297, 39.1754 ], [ "Brunei International Airport", "BWN", 114.9280014038086, 4.944200038909912 ], [ "Philip S. W. Goldson International Airport", "BZE", -88.30819702148438, 17.539100646972656 ], [ "RAF Brize Norton", "BZZ", -1.58362, 51.75 ], [ "Columbia Metropolitan Airport", "CAE", -81.11949920654297, 33.93880081176758 ], [ "Cagliari Elmas Airport", "CAG", 9.05428, 39.251499 ], [ "Cairo International Airport", "CAI", 31.40559959411621, 30.12190055847168 ], [ "Guangzhou Baiyun International Airport", "CAN", 113.29900360107422, 23.39240074157715 ], [ "Columbus Air Force Base", "CBM", -88.44380187990001, 33.6437988281 ], [ "Canberra International Airport", "CBR", 149.19500732421875, -35.30690002441406 ], [ "Calicut International Airport", "CCJ", 75.95529937740001, 11.1367998123 ], [ "Simón Bolívar International Airport", "CCS", -66.991222, 10.601194 ], [ "Netaji Subhash Chandra Bose International Airport", "CCU", 88.44670104980469, 22.654699325561523 ], [ "Charles de Gaulle International Airport", "CDG", 2.55, 49.012798 ], [ "Mactan Cebu International Airport", "CEB", 123.97899627686, 10.307499885559 ], [ "Congonhas Airport", "CGH", -46.65638732910156, -23.626110076904297 ], [ "Soekarno-Hatta International Airport", "CGK", 106.65599823, -6.1255698204 ], [ "Cologne Bonn Airport", "CGN", 7.1427397728, 50.8658981323 ], [ "Zhengzhou Xinzheng International Airport", "CGO", 113.841003418, 34.519699096699995 ], [ "Laguindingan Airport", "CGY", 124.456496, 8.612203 ], [ "Lovell Field", "CHA", -85.20379638671875, 35.035301208496094 ], [ "Christchurch International Airport", "CHC", 172.53199768066406, -43.48939895629883 ], [ "Charleston Air Force Base-International Airport", "CHS", -80.04049683, 32.89860153 ], [ "Ciampino–G. B. Pastine International Airport", "CIA", 12.5949, 41.7994 ], [ "The Eastern Iowa Airport", "CID", -91.71080017089844, 41.884700775146484 ], [ "Cheongju International Airport/Cheongju Air Base (K-59/G-513)", "CJJ", 127.498741, 36.717008 ], [ "Jeju International Airport", "CJU", 126.49299621582031, 33.51129913330078 ], [ "Chongqing Jiangbei International Airport", "CKG", 106.64199829101562, 29.719200134277344 ], [ "Cleveland Hopkins International Airport", "CLE", -81.8498001099, 41.4117012024 ], [ "Charlotte Douglas International Airport", "CLT", -80.94309997558594, 35.2140007019043 ], [ "Bandaranaike International Colombo Airport", "CMB", 79.88410186767578, 7.180759906768799 ], [ "John Glenn Columbus International Airport", "CMH", -82.891899, 39.998001 ], [ "Mohammed V International Airport", "CMN", -7.589970111846924, 33.36750030517578 ], [ "Tancredo Neves International Airport", "CNF", -43.97194290161133, -19.62444305419922 ], [ "Chiang Mai International Airport", "CNX", 98.962600708, 18.766799926799997 ], [ "Cochin International Airport", "COK", 76.401901, 10.152 ], [ "City of Colorado Springs Municipal Airport", "COS", -104.700996, 38.805801 ], [ "Copenhagen Kastrup Airport", "CPH", 12.656000137329, 55.617900848389 ], [ "Cape Town International Airport", "CPT", 18.6016998291, -33.9648017883 ], [ "Diosdado Macapagal International Airport", "CRK", 120.559998, 15.186 ], [ "Brussels South Charleroi Airport", "CRL", 4.45382, 50.459202 ], [ "Corpus Christi International Airport", "CRP", -97.5011978149414, 27.77039909362793 ], [ "Yeager Airport", "CRW", -81.59320068359375, 38.37310028076172 ], [ "Changsha Huanghua International Airport", "CSX", 113.220001221, 28.189199447599997 ], [ "Catania-Fontanarossa Airport", "CTA", 15.0664, 37.466801 ], [ "New Chitose Airport", "CTS", 141.69200134277344, 42.77519989013672 ], [ "Chengdu Shuangliu International Airport", "CTU", 103.9469985961914, 30.578500747680664 ], [ "Cancún International Airport", "CUN", -86.8770980835, 21.036500930800003 ], [ "Alejandro Velasco Astete International Airport", "CUZ", -71.9387969971, -13.535699844400002 ], [ "Cincinnati Northern Kentucky International Airport", "CVG", -84.6678009033, 39.0488014221 ], [ "Cannon Air Force Base", "CVS", -103.321998596, 34.3828010559 ], [ "Afonso Pena Airport", "CWB", -49.1758003235, -25.5284996033 ], [ "Cardiff International Airport", "CWL", -3.343329906463623, 51.39670181274414 ], [ "Daytona Beach International Airport", "DAB", -81.058098, 29.179899 ], [ "Hazrat Shahjalal International Airport", "DAC", 90.397783, 23.843347 ], [ "Da Nang International Airport", "DAD", 108.1989974975586, 16.043899536132812 ], [ "Dallas Love Field", "DAL", -96.851799, 32.847099 ], [ "Damascus International Airport", "DAM", 36.51559829711914, 33.4114990234375 ], [ "Julius Nyerere International Airport", "DAR", 39.202599, -6.87811 ], [ "James M Cox Dayton International Airport", "DAY", -84.21939849853516, 39.902400970458984 ], [ "Dubuque Regional Airport", "DBQ", -90.70950317, 42.40200043 ], [ "Ronald Reagan Washington National Airport", "DCA", -77.037697, 38.8521 ], [ "Indira Gandhi International Airport", "DEL", 77.103104, 28.5665 ], [ "Denver International Airport", "DEN", -104.672996521, 39.861698150635 ], [ "Dallas Fort Worth International Airport", "DFW", -97.038002, 32.896801 ], [ "King Abdulaziz Air Base", "DHA", 50.152000427199994, 26.265399932900003 ], [ "Sentani International Airport", "DJJ", 140.5160064698, -2.5769500733 ], [ "Léopold Sédar Senghor International Airport", "DKR", -17.49020004272461, 14.739700317382812 ], [ "Zhoushuizi Airport", "DLC", 121.53900146484375, 38.9656982421875 ], [ "DLF Airport", "DLF", -100.778002, 29.359501 ], [ "Duluth International Airport", "DLH", -92.19360351559999, 46.8420982361 ], [ "Dalaman International Airport", "DLM", 28.7924995422, 36.7131004333 ], [ "Domodedovo International Airport", "DME", 37.90629959106445, 55.40879821777344 ], [ "Don Mueang International Airport", "DMK", 100.607002258, 13.9125995636 ], [ "King Fahd International Airport", "DMM", 49.79790115356445, 26.471200942993164 ], [ "Kadena Air Base", "DNA", 127.767998, 26.3556 ], [ "Hamad International Airport", "DOH", 51.608056, 25.273056 ], [ "Dover Air Force Base", "DOV", -75.46600342, 39.12950134 ], [ "Ngurah Rai (Bali) International Airport", "DPS", 115.16699981689, -8.7481698989868 ], [ "Duqm International Airport", "DQM", 57.634167, 19.501944 ], [ "Dresden Airport", "DRS", 13.767200469970703, 51.1328010559082 ], [ "Robin Hood Doncaster Sheffield Airport", "DSA", -1.01065635681, 53.4805378105 ], [ "Des Moines International Airport", "DSM", -93.66310119628906, 41.534000396728516 ], [ "Blaise Diagne International Airport", "DSS", -17.073333, 14.67 ], [ "Dortmund Airport", "DTM", 7.61223983765, 51.51829910279999 ], [ "Detroit Metropolitan Wayne County Airport", "DTW", -83.35340118408203, 42.212398529052734 ], [ "Dublin Airport", "DUB", -6.27007, 53.421299 ], [ "King Shaka International Airport", "DUR", 31.1197222222, -29.6144444444 ], [ "Düsseldorf Airport", "DUS", 6.76678, 51.289501 ], [ "Francisco Bangoy International Airport", "DVO", 125.64600372314453, 7.1255202293396 ], [ "Al Maktoum International Airport", "DWC", 55.161389, 24.896356 ], [ "Dubai International Airport", "DXB", 55.3643989563, 25.2527999878 ], [ "Dyess Air Force Base", "DYS", -99.854598999, 32.4207992554 ], [ "Entebbe International Airport", "EBB", 32.443501, 0.042386 ], [ "Edinburgh Airport", "EDI", -3.372499942779541, 55.95000076293945 ], [ "Edwards Air Force Base", "EDW", -117.884003, 34.905399 ], [ "Eindhoven Airport", "EIN", 5.37452983856, 51.4500999451 ], [ "East Midlands Airport", "EMA", -1.32806003094, 52.8311004639 ], [ "Vance Air Force Base", "END", -97.9164962769, 36.339199066199996 ], [ "Erie International Tom Ridge Field", "ERI", -80.1738667488, 42.0831270134 ], [ "Erzurum International Airport", "ERZ", 41.17020034789999, 39.9565010071 ], [ "Esenboğa International Airport", "ESB", 32.995098114, 40.128101348899996 ], [ "Zvartnots International Airport", "EVN", 44.3959007263, 40.1473007202 ], [ "Newark Liberty International Airport", "EWR", -74.168701171875, 40.692501068115234 ], [ "Exeter International Airport", "EXT", -3.4138898849487305, 50.73440170288086 ], [ "Ministro Pistarini International Airport", "EZE", -58.5358, -34.8222 ], [ "Fairbanks International Airport", "FAI", -147.8560028, 64.81510162 ], [ "Faro Airport", "FAO", -7.96590995789, 37.0144004822 ], [ "Leonardo da Vinci–Fiumicino Airport", "FCO", 12.2388889, 41.8002778 ], [ "RAF Fairford", "FFD", -1.7900300025900002, 51.6822013855 ], [ "Wright-Patterson Air Force Base", "FFO", -84.0483016968, 39.8260993958 ], [ "Ndjili International Airport", "FIH", 15.4446, -4.38575 ], [ "Karlsruhe Baden-Baden Airport", "FKB", 8.08049964905, 48.7793998718 ], [ "Fort Lauderdale Hollywood International Airport", "FLL", -80.152702, 26.072599 ], [ "Hercílio Luz International Airport", "FLN", -48.5525016784668, -27.670278549194336 ], [ "Münster Osnabrück Airport", "FMO", 7.68483018875, 52.134601593 ], [ "Lungi International Airport", "FNA", -13.1955, 8.61644 ], [ "Fuzhou Changle International Airport", "FOC", 119.66300201416016, 25.935100555419922 ], [ "Frankfurt am Main Airport", "FRA", 8.570556, 50.033333 ], [ "Manas International Airport", "FRU", 74.4776000977, 43.0612983704 ], [ "Fort Smith Regional Airport", "FSM", -94.36740112304688, 35.33660125732422 ], [ "Mt. Fuji Shizuoka Airport", "FSZ", 138.18775177, 34.7960434679 ], [ "Fort Worth Meacham International Airport", "FTW", -97.362396, 32.819801 ], [ "Fukuoka Airport", "FUK", 130.4510040283203, 33.585899353027344 ], [ "Fort Wayne International Airport", "FWA", -85.19509888, 40.97850037 ], [ "Sir Seretse Khama International Airport", "GBE", 25.9182, -24.555201 ], [ "La Palma Airport", "GCLA", -17.7556, 28.626499 ], [ "Owen Roberts International Airport", "GCM", -81.3576965332, 19.292800903299998 ], [ "Don Miguel Hidalgo Y Costilla International Airport", "GDL", -103.31099700927734, 20.521799087524414 ], [ "Gdańsk Lech Wałęsa Airport", "GDN", 18.46619987487793, 54.377601623535156 ], [ "Spokane International Airport", "GEG", -117.53399658203125, 47.61989974975586 ], [ "Rio Galeão – Tom Jobim International Airport", "GIG", -43.2505569458, -22.8099994659 ], [ "Glasgow International Airport", "GLA", -4.43306016922, 55.8718986511 ], [ "Gimpo International Airport", "GMP", 126.791, 37.5583 ], [ "Genoa Cristoforo Colombo Airport", "GOA", 8.8375, 44.4133 ], [ "Dabolim Airport", "GOI", 73.8313980103, 15.3808002472 ], [ "Gothenburg-Landvetter Airport", "GOT", 12.279800415039, 57.662799835205 ], [ "Gulfport Biloxi International Airport", "GPT", -89.07009887695312, 30.40730094909668 ], [ "Austin Straubel International Airport", "GRB", -88.12960052490234, 44.48509979248047 ], [ "George Airport", "GRJ", 22.378902, -34.0056 ], [ "Guarulhos - Governador André Franco Montoro International Airport", "GRU", -46.47305679321289, -23.435556411743164 ], [ "Grozny North Airport", "GRV", 45.698601, 43.388302 ], [ "Seymour Johnson Air Force Base", "GSB", -77.96060181, 35.33940125 ], [ "Piedmont Triad International Airport", "GSO", -79.93730163574219, 36.097801208496094 ], [ "Greenville Spartanburg International Airport", "GSP", -82.2189025879, 34.8956985474 ], [ "La Aurora Airport", "GUA", -90.527496, 14.5833 ], [ "Grissom Air Reserve Base", "GUS", -86.1520996094, 40.648101806599996 ], [ "Geneva Cointrin International Airport", "GVA", 6.108950138092041, 46.23809814453125 ], [ "Heydar Aliyev International Airport", "GYD", 50.04669952392578, 40.467498779296875 ], [ "Gaziantep International Airport", "GZT", 37.4786987305, 36.9472007751 ], [ "Hannover Airport", "HAJ", 9.685079574580001, 52.461101532 ], [ "Haikou Meilan International Airport", "HAK", 110.45899963378906, 19.934900283813477 ], [ "Hamburg Airport", "HAM", 9.9882297515869, 53.630401611328 ], [ "Noi Bai International Airport", "HAN", 105.80699920654297, 21.221200942993164 ], [ "José Martí International Airport", "HAV", -82.40910339355469, 22.989200592041016 ], [ "Helsinki Vantaa Airport", "HEL", 24.963300704956, 60.317199707031 ], [ "Heraklion International Nikos Kazantzakis Airport", "HER", 25.180299758900002, 35.3396987915 ], [ "Baita International Airport", "HET", 111.823997, 40.851398 ], [ "Hangzhou Xiaoshan International Airport", "HGH", 120.43399810791016, 30.22949981689453 ], [ "Range Regional Airport", "HIB", -92.83899689, 47.38660049 ], [ "Hong Kong International Airport", "HKG", 113.915001, 22.308901 ], [ "Phuket International Airport", "HKT", 98.316902, 8.1132 ], [ "Holloman Air Force Base", "HMN", -106.107002258, 32.8525009155 ], [ "General Ignacio P. Garcia International Airport", "HMO", -111.047996521, 29.095899581900003 ], [ "Tokyo Haneda International Airport", "HND", 139.779999, 35.552299 ], [ "Daniel K Inouye International Airport", "HNL", -157.924228, 21.32062 ], [ "William P Hobby Airport", "HOU", -95.27890015, 29.64539909 ], [ "Taiping Airport", "HRB", 126.25, 45.6234016418457 ], [ "Robert Gabriel Mugabe International Airport", "HRE", 31.0928, -17.931801 ], [ "Hurghada International Airport", "HRG", 33.799400329589844, 27.178300857543945 ], [ "Mattala Rajapaksa International Airport", "HRI", 81.124128, 6.284467 ], [ "Kharkiv International Airport", "HRK", 36.290000915527344, 49.924800872802734 ], [ "Huntsville International Carl T Jones Field", "HSV", -86.775100708008, 34.637199401855 ], [ "Tri-State/Milton J. Ferguson Field", "HTS", -82.55799866, 38.36669922 ], [ "Rajiv Gandhi International Airport", "HYD", 78.4298553467, 17.2313175201 ], [ "Washington Dulles International Airport", "IAD", -77.45580292, 38.94449997 ], [ "George Bush Intercontinental Houston Airport", "IAH", -95.34140014648438, 29.984399795532227 ], [ "Incheon International Airport", "ICN", 126.45099639892578, 37.46910095214844 ], [ "Wichita Eisenhower National Airport", "ICT", -97.433098, 37.649899 ], [ "Imam Khomeini International Airport", "IKA", 51.152198791503906, 35.416099548339844 ], [ "Indianapolis International Airport", "IND", -86.294403, 39.7173 ], [ "New Islamabad International Airport", "ISB", 72.851613, 33.560713 ], [ "Süleyman Demirel International Airport", "ISE", 30.368400573699997, 37.8554000854 ], [ "Atatürk International Airport", "ISL", 28.8146, 40.976898 ], [ "Istanbul Airport", "IST", 28.751944, 41.275278 ], [ "Osaka International Airport", "ITM", 135.43800354003906, 34.785499572753906 ], [ "Jackson-Medgar Wiley Evers International Airport", "JAN", -90.0758972168, 32.3111991882 ], [ "Jacksonville International Airport", "JAX", -81.68789672851562, 30.49410057067871 ], [ "King Abdulaziz International Airport", "JED", 39.156502, 21.6796 ], [ "John F Kennedy International Airport", "JFK", -73.77890015, 40.63980103 ], [ "Joplin Regional Airport", "JLN", -94.49829864501953, 37.151798248291016 ], [ "OR Tambo International Airport", "JNB", 28.246, -26.1392 ], [ "OR Tambo International Airport", "JNB", 28.246, -26.1392 ], [ "O R Tambo International", "JNB", 28.246, -26.1392 ], [ "Juba International Airport", "JUB", 31.6011009216, 4.87201023102 ], [ "Mallam Aminu International Airport", "KAN", 8.52462, 12.0476 ], [ "Boryspil International Airport", "KBP", 30.894699096679688, 50.345001220703125 ], [ "Keflavik International Airport", "KEF", -22.605600357056, 63.985000610352 ], [ "Sary-Arka Airport", "KGF", 73.33439636230469, 49.670799255371094 ], [ "Kigali International Airport", "KGL", 30.1395, -1.96863 ], [ "Kaohsiung International Airport", "KHH", 120.3499984741211, 22.57710075378418 ], [ "Khabarovsk-Novy Airport", "KHV", 135.18800354004, 48.52799987793 ], [ "Norman Manley International Airport", "KIN", -76.7874984741211, 17.935699462890625 ], [ "Kansai International Airport", "KIX", 135.24400329589844, 34.42729949951172 ], [ "Yemelyanovo Airport", "KJA", 92.493301, 56.172901 ], [ "Kunming Changshui International Airport", "KMG", 102.9291667, 25.1019444 ], [ "Kinmen Airport", "KNH", 118.359001, 24.4279 ], [ "Kualanamu International Airport", "KNO", 98.885278, 3.642222 ], [ "Kagoshima Airport", "KOJ", 130.718994140625, 31.80340003967285 ], [ "Kraków John Paul II International Airport", "KRK", 19.7848, 50.077702 ], [ "Khartoum International Airport", "KRT", 32.553199768066406, 15.589500427246094 ], [ "Tribhuvan International Airport", "KTM", 85.3591, 27.6966 ], [ "Katowice International Airport", "KTW", 19.08, 50.4743 ], [ "Kurumoch International Airport", "KUF", 50.16429901123, 53.504901885986 ], [ "Kuala Lumpur International Airport", "KUL", 101.70999908447, 2.745579957962 ], [ "Kunsan Air Base", "KUV", 126.61599731445312, 35.90380096435547 ], [ "Longdongbao Airport", "KWE", 106.8010025024414, 26.53849983215332 ], [ "Kuwait International Airport", "KWI", 47.96889877319336, 29.226600646972656 ], [ "Guilin Liangjiang International Airport", "KWL", 110.03900146484375, 25.21809959411621 ], [ "Kazan International Airport", "KZN", 49.278701782227, 55.606201171875 ], [ "Quatro de Fevereiro Airport", "LAD", 13.2312, -8.85837 ], [ "McCarran International Airport", "LAS", -115.1520004, 36.08010101 ], [ "Los Angeles International Airport", "LAX", -118.4079971, 33.94250107 ], [ "Leeds Bradford Airport", "LBA", -1.6605700254440308, 53.86589813232422 ], [ "Lubbock Preston Smith International Airport", "LBB", -101.822998, 33.663601 ], [ "Larnaca International Airport", "LCA", 33.624900817871094, 34.875099182128906 ], [ "Rickenbacker International Airport", "LCK", -82.927803, 39.813801 ], [ "Pulkovo Airport", "LED", 30.262500762939453, 59.80030059814453 ], [ "Leipzig/Halle Airport", "LEJ", 12.236389, 51.423889 ], [ "Blue Grass Airport", "LEX", -84.60590362548828, 38.0364990234375 ], [ "Langley Air Force Base", "LFI", -76.360496521, 37.082901001 ], [ "Lafayette Regional Airport", "LFT", -91.98760223, 30.20529938 ], [ "La Guardia Airport", "LGA", -73.87259674, 40.77719879 ], [ "Liège Airport", "LGG", 5.443220138549805, 50.63740158081055 ], [ "London Gatwick Airport", "LGW", -0.190278, 51.148102 ], [ "London Heathrow Airport", "LHR", -0.461941, 51.4706 ], [ "Jorge Chávez International Airport", "LIM", -77.114305, -12.0219 ], [ "Milano Linate Airport", "LIN", 9.27674, 45.445099 ], [ "Daniel Oduber Quiros International Airport", "LIR", -85.544403, 10.5933 ], [ "Humberto Delgado Airport (Lisbon Portela Airport)", "LIS", -9.13592, 38.7813 ], [ "Bill & Hillary Clinton National Airport/Adams Field", "LIT", -92.2242965698, 34.729400634799994 ], [ "Ljubljana Jože Pučnik Airport", "LJU", 14.4576, 46.223701 ], [ "RAF Lakenheath", "LKZ", 0.56099998951, 52.409301757799994 ], [ "Luleå Airport", "LLA", 22.121999740601, 65.543800354004 ], [ "Murtala Muhammed International Airport", "LOS", 3.321160078048706, 6.5773701667785645 ], [ "Gran Canaria Airport", "LPA", -15.38659954071045, 27.931900024414062 ], [ "Liverpool John Lennon Airport", "LPL", -2.849720001220703, 53.33359909057617 ], [ "Bassel Al-Assad International Airport", "LTK", 35.948699951171875, 35.401100158691406 ], [ "London Luton Airport", "LTN", -0.36833301186561584, 51.874698638916016 ], [ "Altus Air Force Base", "LTS", -99.2667007446, 34.667098999 ], [ "Cotopaxi International Airport", "LTX", -78.615799, -0.906833 ], [ "Luke Air Force Base", "LUF", -112.383003235, 33.534999847399995 ], [ "Kenneth Kaunda International Airport Lusaka", "LUN", 28.4526004791, -15.3308000565 ], [ "Luxembourg-Findel International Airport", "LUX", 6.2044444, 49.6233333 ], [ "Luxor International Airport", "LXR", 32.7066, 25.671 ], [ "Lyon Saint-Exupéry Airport", "LYS", 5.081111, 45.725556 ], [ "Chennai International Airport", "MAA", 80.16929626464844, 12.990005493164062 ], [ "Adolfo Suárez Madrid–Barajas Airport", "MAD", -3.56264, 40.471926 ], [ "Manchester Airport", "MAN", -2.2749500274658203, 53.35369873046875 ], [ "Mombasa Moi International Airport", "MBA", 39.594200134277344, -4.034830093383789 ], [ "MBS International Airport", "MBS", -84.07959747314453, 43.532901763916016 ], [ "Mac Dill Air Force Base", "MCF", -82.52120209, 27.84930038 ], [ "Kansas City International Airport", "MCI", -94.713898, 39.2976 ], [ "Orlando International Airport", "MCO", -81.30899810791016, 28.429399490356445 ], [ "Muscat International Airport", "MCT", 58.284400939941406, 23.593299865722656 ], [ "Mandalay International Airport", "MDL", 95.97789764404297, 21.702199935913086 ], [ "Chicago Midway International Airport", "MDW", -87.752403, 41.785999 ], [ "Prince Mohammad Bin 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73.52909851074219, 4.191830158233643 ], [ "Quad City International Airport", "MLI", -90.50749969482422, 41.44850158691406 ], [ "Monroe Regional Airport", "MLU", -92.0376968383789, 32.51089859008789 ], [ "Malmö Sturup Airport", "MMX", 13.376197814900001, 55.536305364 ], [ "Rustaq Airport", "MNH", 57.4875, 23.640556 ], [ "Ninoy Aquino International Airport", "MNL", 121.019997, 14.5086 ], [ "Mobile Regional Airport", "MOB", -88.242797851562, 30.691200256348 ], [ "Maputo Airport", "MPM", 32.572601, -25.920799 ], [ "Marseille Provence Airport", "MRS", 5.22142410278, 43.439271922 ], [ "Sir Seewoosagur Ramgoolam International Airport", "MRU", 57.683601, -20.430201 ], [ "Dane County Regional Truax Field", "MSN", -89.3375015258789, 43.13990020751953 ], [ "Minneapolis-St Paul International/Wold-Chamberlain Airport", "MSP", -93.221802, 44.882 ], [ "Minsk National Airport", "MSQ", 28.030700683594, 53.882499694824 ], [ "Louis Armstrong New Orleans International Airport", "MSY", -90.25800323486328, 29.99340057373047 ], [ "General Mariano Escobedo International Airport", "MTY", -100.107002258, 25.7784996033 ], [ "Munich Airport", "MUC", 11.7861, 48.353802 ], [ "Mountain Home Air Force Base", "MUO", -115.872002, 43.043598 ], [ "Carrasco International /General C L Berisso Airport", "MVD", -56.0308, -34.838402 ], [ "Muan International Airport", "MWX", 126.382814, 34.991406 ], [ "Malpensa International Airport", "MXP", 8.72811, 45.6306 ], [ "Naples International Airport", "NAP", 14.2908, 40.886002 ], [ "Lynden Pindling International Airport", "NAS", -77.466202, 25.039 ], [ "Governador Aluízio Alves International Airport", "NAT", -35.376111, -5.768056 ], [ "Beijing Nanyuan Airport", "NAY", 116.38800048828125, 39.782798767089844 ], [ "Enfidha - Hammamet International Airport", "NBE", 10.438611, 36.075833 ], [ "Jomo Kenyatta International Airport", "NBO", 36.9277992249, -1.31923997402 ], [ "Nice-Côte d'Azur Airport", "NCE", 7.215869903560001, 43.6584014893 ], [ "Newcastle Airport", "NCL", -1.6916699409484863, 55.037498474121094 ], [ "N'Djamena International Airport", "NDJ", 15.034, 12.1337 ], [ "Ningbo Lishe International Airport", "NGB", 121.46199798583984, 29.82670021057129 ], [ "Chubu Centrair International Airport", "NGO", 136.80499267578125, 34.8583984375 ], [ "Diori Hamani International Airport", "NIM", 2.18361, 13.4815 ], [ "Nouakchott–Oumtounsy International Airport", "NKC", -15.9697222, 18.31 ], [ "Nanjing Lukou Airport", "NKG", 118.86199951171875, 31.742000579833984 ], [ "Nanning Wuxu Airport", "NNG", 108.1719970703125, 22.608299255371094 ], [ "JOIN ILLUMINAT WONDER MIRACLE TEMPLE +27605775963 AUSTRALIA CANADA USA UEA BELGIUM UK FRANCE ENGLAND GERMANY", "NO", null, null ], [ "Narita International Airport", "NRT", 140.386001587, 35.7647018433 ], [ "Nuremberg Airport", "NUE", 11.078056, 49.498699 ], [ "Norwich International Airport", "NWI", 1.28278005123, 52.6758003235 ], [ "Metropolitan Oakland International Airport", "OAK", -122.221001, 37.721298 ], [ "Odessa International Airport", "ODS", 30.67650032043457, 46.42679977416992 ], [ "Naha Airport", "OKA", 127.646003723, 26.1958007812 ], [ "Will Rogers World Airport", "OKC", -97.60070037841797, 35.39310073852539 ], [ "Yokota Air Base", "OKO", 139.34800720214844, 35.74850082397461 ], [ "Eppley Airfield", "OMA", -95.894096, 41.3032 ], [ "Ontario International Airport", "ONT", -117.60099792480469, 34.055999755859375 ], [ "Francisco de Sá Carneiro Airport", "OPO", -8.68138980865, 41.2481002808 ], [ "Chicago O'Hare International Airport", "ORD", -87.9048, 41.9786 ], [ "Norfolk International Airport", "ORF", -76.20120239257812, 36.89459991455078 ], [ "Cork Airport", "ORK", -8.491109848022461, 51.84130096435547 ], [ "Paris-Orly Airport", "ORY", 2.3794444, 48.7233333 ], [ "Oslo Gardermoen Airport", "OSL", 11.100399971008, 60.193901062012 ], [ "Osan Air Base", "OSN", 127.029999, 37.090599 ], [ "Henri Coandă International Airport", "OTP", 26.085, 44.5711111 ], [ "Ouagadougou Airport", "OUA", -1.51242, 12.3532 ], [ "Tolmachevo Airport", "OVB", 82.650703430176, 55.012599945068 ], [ "Tyndall Air Force Base", "PAM", -85.57540130619999, 30.0695991516 ], [ "Palm Beach International Airport", "PBI", -80.09559631347656, 26.68320083618164 ], [ "João Paulo II Airport", "PDL", -25.6979007721, 37.7411994934 ], [ "Portland International Airport", "PDX", -122.5979996, 45.58869934 ], [ "Beijing Capital International Airport", "PEK", 116.58499908447266, 40.080101013183594 ], [ "Perth International Airport", "PER", 115.96700286865234, -31.94029998779297 ], [ "Paphos International Airport", "PFO", 32.48569869995117, 34.71799850463867 ], [ "Antonio B. Won Pat International Airport", "PGUM", 144.796005249, 13.4834003448 ], [ "Newport News Williamsburg International Airport", "PHF", -76.49299622, 37.13190079 ], [ "Philadelphia International Airport", "PHL", -75.24109649658203, 39.87189865112305 ], [ "Phoenix Sky Harbor International Airport", "PHX", -112.01200103759766, 33.43429946899414 ], [ "General Wayne A. Downing Peoria International Airport", "PIA", -89.6932983398, 40.664199829100006 ], [ "Pittsburgh International Airport", "PIT", -80.23290253, 40.49150085 ], [ "Beijing Daxing International Airport", "PKX", 116.41092, 39.509945 ], [ "Palma De Mallorca Airport", "PMI", 2.73881006241, 39.551700592 ], [ "Falcone–Borsellino Airport", "PMO", 13.091, 38.175999 ], [ "Phnom Penh International Airport", "PNH", 104.84400177001953, 11.546600341796875 ], [ "Port Moresby Jacksons International Airport", "POM", 147.22000122070312, -9.443380355834961 ], [ "Poznań-Ławica Airport", "POZ", 16.8262996674, 52.421001434299995 ], [ "Faa'a International Airport", "PPT", -149.606995, -17.553699 ], [ "Václav Havel Airport Prague", "PRG", 14.26, 50.1008 ], [ "Priština International Airport", "PRN", 21.035801, 42.5728 ], [ "Pisa International Airport", "PSA", 10.3927, 43.683899 ], [ "Pointe-à-Pitre Le Raizet", "PTP", -61.531799, 16.265301 ], [ "Tocumen International Airport", "PTY", -79.3834991455, 9.0713596344 ], [ "Punta Cana International Airport", "PUJ", -68.36340332030001, 18.567399978599997 ], [ "Gimhae International Airport", "PUS", 128.93800354, 35.1795005798 ], [ "Theodore Francis Green State Airport", "PVD", -71.420403, 41.732601 ], [ "Shanghai Pudong International Airport", "PVG", 121.80500030517578, 31.143400192260742 ], [ "Licenciado Gustavo Díaz Ordaz International Airport", "PVR", -105.25399780273438, 20.680099487304688 ], [ "Portland International Jetport Airport", "PWM", -70.30930328, 43.64619827 ], [ "Akwa Ibom International Airport", "QUO", 8.093, 4.8725 ], [ "Rarotonga International Airport", "RAR", -159.805999756, -21.2026996613 ], [ "Raleigh Durham International Airport", "RDU", -78.7874984741211, 35.877601623535156 ], [ "Siem Reap International Airport", "REP", 103.81300354, 13.410699844400002 ], [ "Chicago Rockford International Airport", "RFD", -89.09719848632812, 42.19540023803711 ], [ "Yangon International Airport", "RGN", 96.1332015991, 16.907300949099998 ], [ "Richmond International Airport", "RIC", -77.3197021484375, 37.50519943237305 ], [ "Riga International Airport", "RIX", 23.971099853515625, 56.92359924316406 ], [ "Ramstein Air Base", "RMS", 7.600279808044434, 49.4369010925293 ], [ "Randolph Air Force Base", "RND", -98.27890015, 29.52969933 ], [ "Reno Tahoe International Airport", "RNO", -119.76799774169922, 39.49909973144531 ], [ "Roanoke–Blacksburg Regional Airport", "ROA", -79.975403, 37.3255 ], [ "Roberts International Airport", "ROB", -10.3623, 6.23379 ], [ "Greater Rochester International Airport", "ROC", -77.67240142822266, 43.118900299072266 ], [ "Platov International Airport", "ROV", 39.924722, 47.493888 ], [ "Rochester International Airport", "RST", -92.5, 43.90829849243164 ], [ "Southwest Florida International Airport", "RSW", -81.75520324707031, 26.53619956970215 ], [ "King Khaled International Airport", "RUH", 46.69879913330078, 24.957599639892578 ], [ "Monseñor Óscar Arnulfo Romero International Airport", "SAL", -89.055702, 13.4409 ], [ "San Diego International Airport", "SAN", -117.190002441, 32.7336006165 ], [ "San Antonio International Airport", "SAT", -98.46980285644531, 29.533700942993164 ], [ "Savannah Hilton Head International Airport", "SAV", -81.20210266, 32.12760162 ], [ "Sabiha Gökçen International Airport", "SAW", 29.3092002869, 40.898601532 ], [ "South Bend Regional Airport", "SBN", -86.31729888916016, 41.70869827270508 ], [ "Comodoro Arturo Merino Benítez International Airport", "SCL", -70.78579711914062, -33.393001556396484 ], [ "Santiago de Compostela Airport", "SCQ", -8.415140151977539, 42.89630126953125 ], [ "Louisville International Standiford Field", "SDF", -85.736, 38.1744 ], [ "Las Américas International Airport", "SDQ", -69.668899536133, 18.42970085144 ], [ "Seattle Tacoma International Airport", "SEA", -122.308998, 47.449001 ], [ "Seychelles International Airport", "SEZ", 55.521801, -4.67434 ], [ "Orlando Sanford International Airport", "SFB", -81.23750305175781, 28.777599334716797 ], [ "San Francisco International Airport", "SFO", -122.375, 37.61899948120117 ], [ "Springfield Branson National Airport", "SGF", -93.38860321, 37.24570084 ], [ "Tan Son Nhat International Airport", "SGN", 106.652000427, 10.8187999725 ], [ "Shanghai Hongqiao International Airport", "SHA", 121.33599853515625, 31.197900772094727 ], [ "Taoxian Airport", "SHE", 123.48300170898438, 41.639801025390625 ], [ "Sharjah International Airport", "SHJ", 55.5172004699707, 25.32859992980957 ], [ "Amílcar Cabral International Airport", "SID", -22.9494, 16.7414 ], [ "Singapore Changi Airport", "SIN", 103.994003, 1.35019 ], [ "Simferopol International Airport", "SIP", 33.975101470947266, 45.05220031738281 ], [ "Norman Y. Mineta San Jose International Airport", "SJC", -121.929001, 37.362598 ], [ "Los Cabos International Airport", "SJD", -109.72100067138672, 23.15180015563965 ], [ "Sarajevo International Airport", "SJJ", 18.331499099731445, 43.82460021972656 ], [ "Luis Munoz Marin International Airport", "SJU", -66.0018005371, 18.4393997192 ], [ "Fairchild Air Force Base", "SKA", -117.65599823, 47.6151008606 ], [ "Thessaloniki Macedonia International Airport", "SKG", 22.97089958190918, 40.51969909667969 ], [ "Skopje Alexander the Great Airport", "SKP", 21.621401, 41.961601 ], [ "Sialkot Airport", "SKT", 74.3638916016, 32.5355567932 ], [ "Salt Lake City International Airport", "SLC", -111.97799682617188, 40.78839874267578 ], [ "Sacramento International Airport", "SMF", -121.59100341796875, 38.69540023803711 ], [ "John Wayne Airport-Orange County Airport", "SNA", -117.8679962, 33.67570114 ], [ "Shannon Airport", "SNN", -8.92482, 52.702 ], [ "Sofia Airport", "SOF", 23.411436080932617, 42.696693420410156 ], [ "Dominique Edward Osok Airport", "SOQ", 131.287, -0.894 ], [ "Southampton Airport", "SOU", -1.3567999601364136, 50.95029830932617 ], [ "Abraham Lincoln Capital Airport", "SPI", -89.67790222, 39.84410095 ], [ "Sheppard Air Force Base-Wichita Falls Municipal Airport", "SPS", -98.491898, 33.9888 ], [ "Sarasota Bradenton International Airport", "SRQ", -82.55439758300781, 27.39539909362793 ], [ "Deputado Luiz Eduardo Magalhães International Airport", "SSA", -38.3224983215, -12.9086112976 ], [ "Shaw Air Force Base", "SSC", -80.47059631, 33.97269821 ], [ "St Louis Lambert International Airport", "STL", -90.370003, 38.748697 ], [ "London Stansted Airport", "STN", 0.234999999404, 51.8849983215 ], [ "Stuttgart Airport", "STR", 9.22196006775, 48.689899444599995 ], [ "Juanda International Airport", "SUB", 112.78700256347656, -7.3798298835754395 ], [ "Spirit of St Louis Airport", "SUS", -90.652000427246, 38.662101745605 ], [ "Travis Air Force Base", "SUU", -121.92700195312, 38.262699127197 ], [ "Sioux Gateway Col. Bud Day Field", "SUX", -96.38439941, 42.40259933 ], [ "Stavanger Airport Sola", "SVG", 5.6377801895, 58.876701354 ], [ "Sheremetyevo International Airport", "SVO", 37.4146, 55.972599 ], [ "Koltsovo Airport", "SVX", 60.802700042725, 56.743099212646 ], [ "Berlin-Schönefeld Airport", "SXF", 13.5225, 52.380001 ], [ "Princess Juliana International Airport", "SXM", -63.1088981628, 18.041000366200002 ], [ "Sydney Kingsford Smith International Airport", "SYD", 151.177001953125, -33.94609832763672 ], [ "Syracuse Hancock International Airport", "SYR", -76.1063003540039, 43.11119842529297 ], [ "Sanya Phoenix International Airport", "SYX", 109.41200256347656, 18.302900314331055 ], [ "Shiraz Shahid Dastghaib International Airport", "SYZ", 52.58980178833008, 29.539199829101562 ], [ "Whiteman Air Force Base", "SZL", -93.547897338867, 38.73030090332 ], [ "Shenzhen Bao'an International Airport", "SZX", 113.81099700927734, 22.639299392700195 ], [ "Tashkent International Airport", "TAS", 69.2811965942, 41.257900238 ], [ "Tbilisi International Airport", "TBS", 44.95470047, 41.6692008972 ], [ "Tabriz International Airport", "TBZ", 46.23500061035156, 38.1338996887207 ], [ "McChord Air Force Base", "TCM", -122.475997925, 47.1376991272 ], [ "Lajes Airport", "TER", -27.090799, 38.761799 ], [ "Tenerife Norte Airport", "TFN", -16.3414993286, 28.4827003479 ], [ "Tenerife South Airport", "TFS", -16.5725002289, 28.044500351 ], [ "Podgorica Airport", "TGD", 19.2519, 42.359402 ], [ "Mehrabad International Airport", "THR", 51.31340026855469, 35.68920135498047 ], [ "Tirana International Airport Mother Teresa", "TIA", 19.7206001282, 41.4146995544 ], [ "General Abelardo L. Rodríguez International Airport", "TIJ", -116.97000122070312, 32.541099548339844 ], [ "Tinker Air Force Base", "TIK", -97.386596679688, 35.414699554443 ], [ "Tripoli International Airport", "TIP", 13.1590003967, 32.6635017395 ], [ "Tallahassee Regional Airport", "TLH", -84.35030364990234, 30.396499633789062 ], [ "Lennart Meri Tallinn Airport", "TLL", 24.832799911499997, 59.41329956049999 ], [ "Toulouse-Blagnac Airport", "TLS", 1.36382, 43.629101 ], [ "Ben Gurion International Airport", "TLV", 34.88669967651367, 32.01139831542969 ], [ "Yaoqiang Airport", "TNA", 117.21600341796875, 36.857200622558594 ], [ "Ivato Airport", "TNR", 47.478802, -18.7969 ], [ "Toledo Express Airport", "TOL", -83.80780029, 41.58679962 ], [ "Tromsø Airport", "TOS", 18.918899536132812, 69.68329620361328 ], [ "Tampa International Airport", "TPA", -82.533203125, 27.975500106811523 ], [ "Taiwan Taoyuan International Airport", "TPE", 121.233002, 25.0777 ], [ "Trondheim Airport Værnes", "TRD", 10.9239998, 63.4578018 ], [ "Tri-Cities Regional TN/VA Airport", "TRI", -82.407401, 36.475201 ], [ "Turin Airport", "TRN", 7.64963, 45.200802 ], [ "Trivandrum International Airport", "TRV", 76.9200973511, 8.48211956024 ], [ "Astana International Airport", "TSE", 71.46690368652344, 51.02220153808594 ], [ "Treviso-Sant'Angelo Airport", "TSF", 12.1944, 45.648399 ], [ "Tianjin Binhai International Airport", "TSN", 117.346000671, 39.124401092499994 ], [ "Tulsa International Airport", "TUL", -95.88809967041016, 36.19839859008789 ], [ "Tunis Carthage International Airport", "TUN", 10.22719955444336, 36.85100173950195 ], [ "Tucson International Airport", "TUS", -110.94100189208984, 32.1161003112793 ], [ "Berlin-Tegel Airport", "TXL", 13.2877, 52.5597 ], [ "Taiyuan Wusu Airport", "TYN", 112.62799835205078, 37.74689865112305 ], [ "McGhee Tyson Airport", "TYS", -83.9940033, 35.81100082 ], [ "Trabzon International Airport", "TZX", 39.78969955444336, 40.99509811401367 ], [ "Ufa International Airport", "UFA", 55.874401092529, 54.557498931885 ], [ "Mariscal Sucre International Airport", "UIO", -78.3575, -0.129166666667 ], [ "Chinggis Khaan International Airport", "ULN", 106.766998, 47.843102 ], [ "Hasanuddin International Airport", "UPG", 119.55400085449219, -5.061629772186279 ], [ "Ürümqi Diwopu International Airport", "URC", 87.47419738769531, 43.907100677490234 ], [ "Varna Airport", "VAR", 27.8251, 43.232101 ], [ "Vandenberg Air Force Base", "VBG", -120.583999634, 34.7373008728 ], [ "Venice Marco Polo Airport", "VCE", 12.3519, 45.505299 ], [ "Ovda International Airport", "VDA", 34.93579864501953, 29.94029998779297 ], [ "Vienna International Airport", "VIE", 16.569700241089, 48.110298156738 ], [ "Vnukovo International Airport", "VKO", 37.2615013123, 55.5914993286 ], [ "Vilnius International Airport", "VNO", 25.285801, 54.634102 ], [ "Destin-Ft Walton Beach Airport", "VPS", -86.525398, 30.4832 ], [ "Juan Gualberto Gomez International Airport", "VRA", -81.435302734375, 23.034400939941406 ], [ "Verona Villafranca Airport", "VRN", 10.8885, 45.395699 ], [ "Viru Viru International Airport", "VVI", -63.135399, -17.6448 ], [ "Warsaw Chopin Airport", "WAW", 20.967100143399996, 52.1656990051 ], [ "Hosea Kutako International Airport", "WDH", 17.4709, -22.4799 ], [ "Wellington International Airport", "WLG", 174.804992676, -41.3272018433 ], [ "Modlin Airport", "WMI", 20.6518, 52.451099 ], [ "Wenzhou Longwan International Airport", "WNZ", 120.851997, 27.912201 ], [ "Robins Air Force Base", "WRB", -83.5919036865, 32.6400985718 ], [ "Copernicus Wrocław Airport", "WRO", 16.885799408, 51.1026992798 ], [ "Wuhan Tianhe International Airport", "WUH", 114.208, 30.7838 ], [ "Xi'an Xianyang International Airport", "XIY", 108.751999, 34.447102 ], [ "Xiamen Gaoqi International Airport", "XMN", 118.12799835205078, 24.54400062561035 ], [ "Edmonton International Airport", "YEG", -113.580001831, 53.309700012200004 ], [ "Halifax / Stanfield International Airport", "YHZ", -63.5085983276, 44.8807983398 ], [ "Ottawa Macdonald-Cartier International Airport", "YOW", -75.66919708251953, 45.3224983215332 ], [ "Montreal / Pierre Elliott Trudeau International Airport", "YUL", -73.7407989502, 45.4706001282 ], [ "Vancouver International Airport", "YVR", -123.183998108, 49.193901062 ], [ "Winnipeg / James Armstrong Richardson International Airport", "YWG", -97.2398986816, 49.909999847399995 ], [ "Calgary International Airport", "YYC", -114.019996643, 51.113899231 ], [ "Victoria International Airport", "YYJ", -123.426002502, 48.646900177 ], [ "St. John's International Airport", "YYT", -52.7518997192, 47.618598938 ], [ "Lester B. Pearson International Airport", "YYZ", -79.63059997559999, 43.6772003174 ], [ "Zagreb Airport", "ZAG", 16.0687999725, 45.7429008484 ], [ "Zhukovsky International Airport", "ZIA", 38.150002, 55.553299 ], [ "Abeid Amani Karume International Airport", "ZNZ", 39.224899, -6.22202 ], [ "Zürich Airport", "ZRH", 8.54917, 47.464699 ] ]35:[] 2f:{"title":"How to Draw an Airport 🛫","cells":[{"id":0,"value":"md`# How to Draw an Airport 🛫\nI wanted to make some airport maps, because airport layouts are surprisingly varied and more fun to look at when viewed abstractly from above than in person on the ground! This notebook draws them with [Tilezen vector tiles](https://github.com/tilezen/vector-datasource) and D3.\n\nSelect an airport:\n`","pinned":false,"hidden":false,"mode":"ojs"},{"id":233,"value":"viewof search = html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":235,"value":"viewof selectedAirportJSON = html`\n`","pinned":false,"hidden":false,"mode":"ojs"},{"id":584,"value":"mutable loadStatus = ''","pinned":false,"hidden":false,"mode":"ojs"},{"id":59,"value":"svg``","pinned":false,"hidden":false,"mode":"ojs"},{"id":431,"value":"selectedAirport = selectedAirportJSON !== '' && JSON.parse(decodeURIComponent(selectedAirportJSON));","pinned":false,"hidden":false,"mode":"ojs"},{"id":460,"value":"$31","pinned":false,"hidden":false,"mode":"ojs"},{"id":453,"value":"featureFilters = [\n ['roads', ['kind', ['aeroway']], { stroke: 'black', strokeWidth: '1px' }],\n ['roads', ['landuse_kind', ['aerodrome']], { stroke: 'grey', strokeWidth: '0.75px' }],\n ['buildings', ['landuse_kind', ['aerodrome']], { fill: 'lightgrey', /*stroke: 'black', strokeWidth: '0.5px'*/ }],\n];","pinned":true,"hidden":false,"mode":"ojs"},{"id":477,"value":"md`A matching function takes an object of vector tile features, keyed by layer name, matches them to the filters applied above, and copies the appropriate style to each feature. (Note, this doesn't yet account for features that might match multiple filters, nor does it handle rendering order between features.)`","pinned":false,"hidden":false,"mode":"ojs"},{"id":445,"value":"function matchAndStyleFeatures(filters) {\n // makes a matching function for a given set of filters as defined above\n return function(layers) {\n return filters.reduce((features, filter) => {\n const [layer, [tag, values], style] = filter;\n if (layers[layer]) {\n features.push(...layers[layer].features\n .filter(f => values.indexOf(f.properties[tag]) > -1) // filter by tag values\n .map(f => { f.properties.style = style; return f; }) // add style info to feature\n );\n }\n return features;\n }, []);\n }\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":609,"value":"matchAirports = matchAndStyleFeatures(featureFilters)","pinned":true,"hidden":false,"mode":"ojs"},{"id":481,"value":"$32","pinned":false,"hidden":false,"mode":"ojs"},{"id":509,"value":"centerPoint = selectedAirport ? [selectedAirport[2], selectedAirport[3]] : [];","pinned":false,"hidden":false,"mode":"ojs"},{"id":73,"value":"tileZoom = 15","pinned":false,"hidden":false,"mode":"ojs"},{"id":512,"value":"startTile = lngLatToTile(centerPoint, tileZoom);","pinned":false,"hidden":false,"mode":"ojs"},{"id":375,"value":"md`Find all the matching features and wrap the them in a GeoJSON object:`","pinned":false,"hidden":false,"mode":"ojs"},{"id":156,"value":"geojson = {\n // use Observable mutable values to show a status message up top while loading\n mutable loadStatus = md`Loading... it can take a few seconds to find all the tiles ⏳`;\n \n const geojson = {\n type: 'FeatureCollection',\n features: selectedAirport ? await getFeaturesNearTiles(startTile, startTile, matchAirports) : []\n }\n \n mutable loadStatus = md`Tada! ✨`;\n return geojson;\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":148,"value":"$33","pinned":true,"hidden":false,"mode":"ojs"},{"id":562,"value":"md`\n## Rendering 🖌🛬\nThe matching features are drawn using a D3 path generator (currently in SVG, but could also be Canvas). A mercator projection is used but really any would do at the high-zooms we're rendering.\n\nExpand the map SVG panel at the top of the page to see how the SVG is built with the \\`geojson\\` and \\`path\\` objects.\n`","pinned":false,"hidden":false,"mode":"ojs"},{"id":61,"value":"imageSize = [width, width * 0.75]","pinned":false,"hidden":false,"mode":"ojs"},{"id":49,"value":"d3 = require(\"d3-geo@1\")","pinned":false,"hidden":false,"mode":"ojs"},{"id":573,"value":"md`Tell the path to fit the data to the image size:`","pinned":false,"hidden":false,"mode":"ojs"},{"id":51,"value":"path = d3.geoPath(d3.geoMercator().fitSize(imageSize, geojson));","pinned":true,"hidden":false,"mode":"ojs"},{"id":343,"value":"md`Utility function for converting lat/lng to web mercator tile coordinate:`","pinned":false,"hidden":false,"mode":"ojs"},{"id":12,"value":"function lngLatToTile ([x, y], z) {\n const halfCircumferenceMeters = 20037508.342789244;\n \n // Latitude\n y = Math.log(Math.tan(y * Math.PI / 360 + Math.PI / 4)) / Math.PI;\n y *= halfCircumferenceMeters;\n\n // Longitude\n x *= halfCircumferenceMeters / 180;\n\n // Tile\n return [\n Math.floor((x + halfCircumferenceMeters) / (halfCircumferenceMeters * 2 / Math.pow(2, z))),\n Math.floor((-y + halfCircumferenceMeters) / (halfCircumferenceMeters * 2 / Math.pow(2, z))),\n z\n ];\n};\n","pinned":false,"hidden":false,"mode":"ojs"},{"id":278,"value":"md`\n## Setup 🔨\nAirport data from http://ourairports.com/data/ (copied as static data here):\n`","pinned":false,"hidden":false,"mode":"ojs"},{"id":201,"value":"$34","pinned":false,"hidden":false,"mode":"ojs"},{"id":338,"value":"md`Set an airport code from the \\`airport\\` URL parameter, or default to JFK.`","pinned":false,"hidden":false,"mode":"ojs"},{"id":283,"value":"defaultAirport = {\n const params = new URLSearchParams(location.search);\n return params.get('airport') || 'JFK';\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":350,"value":"md`Nextzen vector tile API key. Sign up for yours here! https://developers.nextzen.org/`","pinned":false,"hidden":false,"mode":"ojs"},{"id":9,"value":"nextzenAPIKey = 'fYFPuX-sQ76LIEN8-U_lVQ'","pinned":false,"hidden":false,"mode":"ojs"}],"files":"$W35","stdlib":"1","titling":"auto"}