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API · /geodesy-api

Geodesy API

healthy 4,278 Subscribers

Advanced geodesy beyond the simple great circle. The vincenty endpoint computes the distance between two latitude/longitude points on the WGS84 ellipsoid using Vincenty's inverse formula — accurate to within a millimetre, far better than the spherical approximation — plus the initial and final bearings, in metres, kilometres, miles and nautical miles. The rhumb endpoint computes the rhumb-line (loxodrome) distance and the single constant compass bearing that follows it — the path you steer by holding a heading, as used in marine and air navigation. The cross-track endpoint finds how far a point lies to the left or right of a great-circle path between two points (the cross-track distance) and how far along that path it is (the along-track distance). Everything is computed locally and deterministically, so it is instant and private. Ideal for marine and aviation navigation, surveying and GIS, route analysis, and precise mapping. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 4 endpoints. This is advanced geodesy; for simple great-circle distance, bearing, midpoint and destination use a geo-distance API and for coordinate-format conversion use a geo-convert API.

#geodesy #vincenty #rhumb-line #navigation #gis #developer-tools
api.oanor.com/geodesy-api
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Machine-readable spec so AI agents can integrate this API.

/api/geodesy-api/openapi.json
/api/geodesy-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
86 ms
Server probes · 24h
Subscribers
4,278
active
Total calls
44
last 7 days
status Full status page → · 20 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 8,235 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 8,235 calls/month
  • 2 req/sec
  • Vincenty + rhumb + cross-track
  • No credit card
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Starter

€9.75 /month

  • 17,750 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 17.75k calls/month
  • 8 req/sec
  • Millimetre-accurate WGS84
  • Email support
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Pro

€29.65 /month

  • 228,500 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 228.5k calls/month
  • 20 req/sec
  • Marine / aviation / GIS pipelines
  • Priority support
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Mega

€67.65 /month

  • 1,185,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 1.185M calls/month
  • 50 req/sec
  • Platform scale
  • Dedicated SLA
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Related APIs

Other APIs with overlapping tags.

Coordinate Systems API

Map projections and coordinate reference systems as an API — the EPSG dataset made queryable. Every CRS, from geographic systems like WGS 84 (the GPS standard, EPSG 4326) to projected ones like Web Mercator (3857), the UTM zones and national grids, has an EPSG code. Search the dataset by name to find the code you need, then resolve any code to its full definition: name, kind (geographic, projected, …), area of use, scope, and — most usefully — the ready-to-paste PROJ.4 string and WKT definition that GIS libraries (GDAL, PROJ, PostGIS, Leaflet, OpenLayers, QGIS, GeoPandas) consume directly. Search comes from the official EPSG Registry maintained by IOGP; the PROJ.4/WKT exports come from epsg.io. A geodesy / coordinate-reference-system resource — distinct from geocoding (addresses to coordinates), geohashing and administrative-boundary APIs. Ideal for GIS, mapping, surveying, remote-sensing and spatial-data applications.

api.oanor.com/epsg-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

Navaids API

Radio navigation aids (navaids) as an API — 11,000+ VOR, NDB, DME, TACAN, VORTAC and VOR-DME beacons across 231 countries, from the OurAirports dataset. Look up a navaid by its ident (e.g. JFK → Kennedy VOR-DME 115.9 MHz), search by name/ident with country and type filters, or find all navaids within a radius of any coordinate. Each record carries the ident, name, type, frequency (kHz and MHz), elevation, country and any associated airport. Ideal for aviation tools, flight simulators, EFB apps, flight planning and aeronautical charts.

api.oanor.com/navaids-api

Routing API

Driving routes with distance, duration and geometry, distance/duration matrices for up to 25 points, and nearest-road snapping — on the global OpenStreetMap road network. Coordinates are simple lat,lon pairs.

api.oanor.com/routing-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Geodesy API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Geodesy API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Geodesy API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Geodesy API cost?
Geodesy API has a free tier with 100 calls / month. Paid plans start at €9.75 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Geodesy API GDPR-compliant?
All requests to Geodesy API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/geodesy-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/geodesy-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/geodesy-api/SOME_PATH");
curl_setopt($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/geodesy-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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