mkhatib · May 24, 2013 02:55 · May 24, 2013
diff --git a/geo.js b/geo.js
@@ -0,0 +1,47 @@
+/**
+* Generates number of random geolocation points given a center and a radius.
+* @param  {Object} center A JS object with lat and lng attributes.
+* @param  {number} radius Radius in meters.
+* @param {number} count Number of points to generate.
+* @return {array} Array of Objects with lat and lng attributes.
+*/
+function generateRandomPoints(center, radius, count) {
+  var points = [];
+  for (var i=0; i<count; i++) {
+    points.push(generateRandomPoint(center, radius));
+  }
+  return points;
+}
+
+
+/**
+* Generates number of random geolocation points given a center and a radius.
+* Reference URL: http://goo.gl/KWcPE.
+* @param  {Object} center A JS object with lat and lng attributes.
+* @param  {number} radius Radius in meters.
+* @return {Object} The generated random points as JS object with lat and lng attributes.
+*/
+function generateRandomPoint(center, radius) {
+  var x0 = center.lng;
+  var y0 = center.lat;
+  // Convert Radius from meters to degrees.
+  var rd = radius/111300;
+
+  var u = Math.random();
+  var v = Math.random();
+
+  var w = rd * Math.sqrt(u);
+  var t = 2 * Math.PI * v;
+  var x = w * Math.cos(t);
+  var y = w * Math.sin(t);
+
+  var xp = x/Math.cos(y0);
+
+  // Resulting point.
+  return {'lat': y+y0, 'lng': xp+x0};
+}
+
+
+// Usage Example.
+// Generates 100 points that is in a 1km radius from the given lat and lng point.
+var randomGeoPoints = generateRandomPoints({'lat':24.23, 'lng':23.12}, 1000, 100);