Created
October 29, 2014 13:11
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js: distance to (geolocation)
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distanceTo : function(point) { | |
var self = this; | |
var R = 6371; // mean radius of earth | |
var location = self.origin.getPosition(); | |
var lat1 = self.toRad_(location.lat()); | |
var lon1 = self.toRad_(location.lng()); | |
var lat2 = self.toRad_(point.lat); | |
var lon2 = self.toRad_(point.lng); | |
var dLat = lat2 - lat1; | |
var dLon = lon2 - lon1; | |
var a = Math.sin(dLat / 2) * Math.sin(dLat / 2) + | |
Math.cos(lat1) * Math.cos(lat2) * | |
Math.sin(dLon / 2) * Math.sin(dLon / 2); | |
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a)); | |
return R * c; | |
} |
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