Determine the great-circle distance between two points on a sphere given their longitudes and latitudes
npm install haversine-js> Implementation of the haversine formula to calculate the great-circle distance between two points on a sphere given their longitudes and latitudes :earth_americas:
``
$ npm install --save haversine-js
`
`js
const haversine = require('haversine-js');
const atlanta = {
latitude: 33.7490,
longitude: -84.3880
};
const london = {
latitude: 51.5074,
longitude: -0.1278
};
const options = {
radius: haversine.EARTH.MILE
};
haversine(atlanta, london, options).toFixed(0);
//=> 4207
`
#### start, end
Type: object
Object containing the longitude/latitude coordinate pair for either point.
`js`
const start = {
longitude: 33.7490,
latitude: 84.3880
};
#### options
##### radius
Type: number
Default:
The radius of the sphere.
#### isRadians
Type: boolean false`
Default:
Set to true if the longitude/latitude values are in radians.
| Constant | Value
| ------------- |:-------------:|
| EARTH.MILE | 3959 |
| EARTH.KM | 6371 |
| EARTH.M | 6371000 |
| EARTH.NMI | 3440 |
MIT © Brandon Smith