Created
January 23, 2015 23:16
-
-
Save mihdan/119741cd8a18f750bca1 to your computer and use it in GitHub Desktop.
Haversine formula
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
var rad = function(x) { | |
return x * Math.PI / 180; | |
}; | |
var getDistance = function(p1, p2) { | |
var R = 6378137; // Earth’s mean radius in meter | |
var dLat = rad(p2.lat() - p1.lat()); | |
var dLong = rad(p2.lng() - p1.lng()); | |
var a = Math.sin(dLat / 2) * Math.sin(dLat / 2) + | |
Math.cos(rad(p1.lat())) * Math.cos(rad(p2.lat())) * | |
Math.sin(dLong / 2) * Math.sin(dLong / 2); | |
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a)); | |
var d = R * c; | |
return d; // returns the distance in meter | |
}; |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment