A Leaflet TileLayer class for loading "compact" URL schemes.

leaflet-compact.js

L.CompactTileLayer = L.TileLayer.extend({
  getTileUrl: function(tilePoint) {
      this._adjustTilePoint(tilePoint);
      var col = String("000000" + tilePoint.x).slice(String(tilePoint.x).length),
          row = String("000000" + tilePoint.y).slice(String(tilePoint.y).length),
          zoom = this._getZoomForUrl();
      return this._url
        .replace("{z}", zoom)
        .replace("{x}", col.slice(0, 3) + "/" + col.slice(3, 6))
        .replace("{y}", row.slice(0, 3) + "/" + row.slice(3, 6));
    }
});