@ue-too/border / index / greatCircleDistance

関数: greatCircleDistance()

greatCircleDistance(startCoord, endCoord): number

定義: greateCircle.ts:155

Calculates the great circle distance between two points on Earth.

パラメータ

startCoord

GeoCoord

The starting geographic coordinate

endCoord

GeoCoord

The ending geographic coordinate

戻り値

number

The distance in meters

Remarks

Uses the haversine formula to calculate the shortest distance over Earth's surface between two geographic coordinates. This is the "as-the-crow-flies" distance.

The calculation assumes Earth's mean radius of 6,371,000 meters and treats Earth as a perfect sphere.

例

const nyc = { latitude: 40.7128, longitude: -74.0060 };
const london = { latitude: 51.5074, longitude: -0.1278 };

const distance = greatCircleDistance(nyc, london);
console.log('Distance:', distance / 1000, 'km'); // ~5570 km