Move coordinates by metres

Benchmark created by Jaap on

Preparation HTML

<script src="http://cdn.leafletjs.com/leaflet-0.4.5/leaflet.js"></script>

Setup

var latLng1 = [-37.7772, 175.2756];
    var latLng2 = {lat: -37.7772, lng: 175.2756};
    
    var meters = [100, 100];
    
    
                var moveCoordinatesByMetres = function(latLng, m) {
                        var pi = Math.PI;
                        //Earth’s radius, sphere
                        var R = 6378137;
                        // latLng to transform
                        var lat = latLng[0] || latLng.lat;
                        var lng = latLng[1] || latLng.lng;
    
                        //Coordinate offsets in radians
                        var dLat = m[0] / R;
                        var dLng = m[1] / ( R * Math.cos(pi * lat / 180) );
    
                        //OffsetPosition, decimal degrees
                        lat = lat + ( dLat * 180 / pi );
                        lng = lng + ( dLng * 180 / pi );
                        
                        return [lat, lng];
                }

Test runner

Ready to run.

Testing in
TestOps/sec
LatLng1
moveCoordinatesByMetres(latLng1, meters);
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LatLng2
moveCoordinatesByMetres(latLng2, meters);
ready

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