a guest on Feb 28th, 2012 - pastebin.com/1YXe6Nvd

gistfile1.js

for (var i = 0; i < mapPoints.length; i++){
    for (var j = i + 1; j < mapPoints.length; j++){
        var p1 = mapPoints[i];
        var p2 = mapPoints[j];
        if (getDistance(p1, p2) < 0.1){ // If distance between points is greater than .1 km
            var midpoint = getMidpoint(p1, p2);                
            
            mapPoints.push(midpoint);
            mapPoints.splice(i, 1);
            mapPoints.splice(j, 1);
        }
    }
}