@ue-too/border / index / greatCircleDistance

函式: greatCircleDistance()

greatCircleDistance(startCoord, endCoord): number

定義於: greateCircle.ts:155

Calculates the great circle distance between two points on Earth.

參數

startCoord

GeoCoord

The starting geographic coordinate

endCoord

GeoCoord

The ending geographic coordinate

回傳

number

The distance in meters

備註

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.

範例

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