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Geo Calc – Geodesic Direct (Vincenty)
x402
Geo Calc – Geodesic Direct (Vincenty) is a paid API for AI agents from geo-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Computes the destination latitude/longitude and final bearing from a start point, given an initial bearing and distance, using the Vincenty direct formula on the WGS84 ellipsoid.
Price / call$0.02
Success—
StatusUnknown
How this service works
Destination latitude/longitude and final bearing from a start point, initial bearing and distance (WGS84, Vincenty).
Output
Returns the destination latitude and longitude (WGS84, Vincenty ellipsoidal), the final bearing at arrival in degrees, and for comparison the spherical (haversine) destination coordinates and the offset in meters between the two methods. Also includes metadata such as ellipsoid name, data source, and any applicable disclaimers.
Example use cases
Drone waypoint projection for survey route
“My drone starts at 37.7749° N, 122.4194° W and needs to fly 5,000 meters on a bearing of 45 degrees northeast — what are the exact destination coordinates and final bearing it should record?”
Ship dead reckoning position fix
“A vessel departs from 51.5074° N, 0.1278° W on a heading of 270 degrees and travels 120,000 meters. Using the accurate WGS84 ellipsoid calculation, what latitude and longitude does it arrive at?”
Hiking trail endpoint calculation
“I'm starting a hike at 46.5197° N, 6.6323° E and heading due south at 180 degrees for 8,000 meters. What are my precise ending coordinates so I can drop a pin on the map?”
Technical details
Endpoint
GEThttps://geo-calc.x402tookit.com/geodesic-direct?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need high-accuracy geodesic projection on the WGS84 ellipsoid (Vincenty direct formula) — preferred over simple haversine/spherical methods when precision matters for long distances, survey work, aviation, maritime navigation, or scientific applications. The response also includes a spherical comparison result so you can quantify the error of simpler methods.
Side effects
- Missing required query parameters (lat, lon, bearing, distanceM) returns a 400 error
- Distance out of range (>20,000,000 meters or negative) may produce invalid or error results
- Invalid bearing value outside 0–360 degrees may cause incorrect calculations
- Antipodal or near-antipodal points can cause Vincenty algorithm convergence failure
- Payment failure or insufficient USDC balance returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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