gistfile1.txt

function buildQuery(points, zoom) {
    var queryObject = {}, output = [];
    for (var i = 0; i < points.length; i++) {
        var xyz = sm.xyz([points[i][1], points[i][0], points[i][1], points[i][0]], zoom);
        var tileName = zoom + '/' + xyz.minX + '/' + xyz.minY;
        if (queryObject[tileName] === undefined) {
            queryObject[tileName] = {
                zxy: {
                    z: zoom,
                    x: xyz.minX,
                    y: xyz.minY
                },
                points: [
                    [points[i][1], points[i][0]]
                ],
                pointIDs: [i]

            };
            output.push(queryObject[tileName]);
        } else {
            queryObject[tileName].points.push([points[i][1], points[i][0]]);
            queryObject[tileName].pointIDs.push(i);
        }
    }
    return output;
}