latlong Crazy simple module for adding distance to latlongs API new LatLong(latitude, longitude) LatLong.move(north, east) LatLong.moveNorth(meters) LatLong.moveSouth(meters) LatLong.moveEast(meters) LatLong.moveWest(meters) Example var LatLong = require('simple-latlong'); var location = new LatLong(0, 0); location.moveNorth(50); location.move(50, 0); console.log(location.lat); // 0.0008983152841195215