Locator to coordinates
API · /maidenhead-api
Maidenhead Locator API
salutare
4,890 Abbonati
Convert between latitude/longitude and the Maidenhead Locator System — the grid-square "QTH locator" (like JN58td or IO91wm) used by amateur radio, APRS and contesting to describe a position compactly. The encode endpoint turns a latitude and longitude into a locator at 4-, 6-, 8- or 10-character precision. The decode endpoint turns a locator back into the centre coordinates, the south-west corner and the size of the grid square. The distance endpoint gives the great-circle distance (kilometres and miles) and bearing between the centres of two locators — the classic "how far and which way is that station". Everything is computed locally and deterministically, so it is instant and private. Ideal for amateur-radio and APRS tools, contest logging, antenna aiming, and grid-based mapping. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is the Maidenhead system; for Plus Codes, MGRS, UTM and DMS use a geo-convert API and for precise geodesic distance use a geodesy API.
api.oanor.com/maidenhead-api
API salute
salutare- Tempo di attività
- 100.00%
- Sondaggi del server · 24 ore su 24
- Latenza media
- 95 ms
- Sondaggi del server · 24 ore su 24
- Abbonati
- 4,890
- attiva
- Chiamate totali
- 44
- ultimi 7 giorni
Prezzi
Scegli un livello: fatturazione mensile, annullamento in qualsiasi momento.
Free
Gratis
- 8,535 chiamate/mese
- 2 richieste/secondo
- Tetto rigido (429 sopra la quota, nessuna eccedenza)
- 8,535 calls/month
- 2 req/sec
- Encode + decode + distance
- No credit card
Starter
€10.05 /mese
- 18,050 chiamate/mese
- 8 richieste/secondo
- Tetto rigido (429 sopra la quota, nessuna eccedenza)
- 18.05k calls/month
- 8 req/sec
- 4/6/8/10-char precision
- Email support
Pro
€29.95 /mese
- 231,500 chiamate/mese
- 20 richieste/secondo
- Tetto rigido (429 sopra la quota, nessuna eccedenza)
- 231.5k llamadas/mes
- 20 req/seg
- Pipelines de radioaficionado / APRS
- Soporte prioritario
Mega
€67.95 /mese
- 1,200,000 chiamate/mese
- 50 richieste/secondo
- Tetto rigido (429 sopra la quota, nessuna eccedenza)
- 1.2M calls/month
- 50 req/sec
- Platform scale
- Dedicated SLA
Costruito da
Correlato APIs
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Antenna length maths as an API, computed locally and deterministically. The dipole endpoint gives the total and per-leg length of a half-wave dipole for a frequency, in metres, feet, inches and centimetres, applying a velocity factor (about 0.95 for wire) and also reporting the classic 468 ÷ f(MHz) feet rule of thumb. The quarterwave endpoint gives the element length of a quarter-wave vertical or monopole, with the 234 ÷ f(MHz) rule. The element endpoint computes the length of an element at any fraction of a wavelength — full-wave, half-wave, quarter-wave, fifth-wave, five-eighths or a custom fraction. Frequencies accept Hz, kHz, MHz and GHz, and the velocity factor is configurable. Everything is computed locally and deterministically, so it is instant and private. These are starting lengths: real antennas need trimming and tuning for the lowest SWR, as end effects and surroundings shift the resonant length. Ideal for amateur-radio and RF tools, antenna and IoT design, and electronics education. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is antenna geometry; for general wavelength, frequency and photon energy use a wavelength API.
api.oanor.com/antenna-api
Geo Distance API
Great-circle (as-the-crow-flies) navigation maths between latitude/longitude points. The distance endpoint returns the straight-line distance in metres, kilometres, miles and nautical miles, plus the initial and final compass bearing and the nearest 16-point compass direction. The destination endpoint computes where you end up from a start point, a bearing and a distance, and the midpoint endpoint finds the great-circle midpoint between two points. Perfect for proximity and radius search, geofencing, flight and shipping estimates, "distance from me" features and mapping. Pure local computation — no key, no third-party service, instant. These are straight-line distances on a spherical earth, not road routes. Live, nothing stored. 4 endpoints. Distinct from road routing, GeoJSON geometry measurement and coordinate-format conversion.
api.oanor.com/geodistance-api
Gene Expression API
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api.oanor.com/geodatasets-api
Country Subdivisions API
Look up the administrative subdivisions of any country — 5,300+ states, provinces, regions and districts across 229 countries, with ISO 3166-2 codes. Search by name, country or type, fetch all subdivisions of a country (perfect for address-form dropdowns), or resolve an ISO 3166-2 code like US-CA to its name, type and coordinates. Bundled, fast and always available.
api.oanor.com/regions-api
Domande frequenti
Risposte rapide su prezzi, quote e integrazione.
Come ottengo una chiave API per Maidenhead Locator API?
Registrati gratuitamente su oanor.com, genera una chiave API dalla dashboard sviluppatore e chiama Maidenhead Locator API con l'header x-oanor-key. Nessuna carta di credito richiesta per il piano gratuito.
Qual è il limite di velocità di Maidenhead Locator API?
Il piano gratuito consente 1 richiesta al secondo. I piani a pagamento arrivano fino a 50 richieste al secondo nel piano Mega. I limiti rigorosi restituiscono HTTP 429 oltre la quota — nessuna spesa imprevista.
Quanto costa Maidenhead Locator API?
Maidenhead Locator API ha un piano gratuito con 100 chiamate / mese. I piani a pagamento partono da €10.05 / mese con quote più alte e limiti di velocità più rapidi.
Posso cancellare l'abbonamento in qualsiasi momento?
Sì. I piani sono fatturati mensilmente e puoi cancellare in qualsiasi momento dalla dashboard di fatturazione. Nessun contratto a lungo termine e nessuna penale di cancellazione.
Maidenhead Locator API è conforme al GDPR?
Tutte le richieste a Maidenhead Locator API passano attraverso il nostro gateway in UE. La tua chiave upstream non lascia mai il nostro server e nessun dato personale viene condiviso con il fornitore upstream oltre alla richiesta inviata.
Scegli un endpoint dall'elenco a sinistra per visualizzarne i dettagli e provarlo.
Frammenti di codice
Iscriviti per ottenere una chiave API, quindi chiama qualsiasi percorso sotto il tuo slug.
curl https://api.oanor.com/maidenhead-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."const res = await fetch("https://api.oanor.com/maidenhead-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();$ch = curl_init("https://api.oanor.com/maidenhead-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);import requests
r = requests.get(
"https://api.oanor.com/maidenhead-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())Valutazioni
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