Created
May 24, 2013 02:55
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A Javascript utility function to generate number of random Geolocations around a center location and in a defined radius.
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/** | |
* 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); |
Thank you
thanks!
This is exactly what I need, thank you for the sharing!
Thank you 😁
thanks!
Wonderful! Thanks!
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Very nice thank you very much!