code: function quadkeyToTile(quadkey) {
      var x = 0;
      var y = 0;
      var z = quadkey.length;
  
      for (var i = z; i > 0; i--) {
          var mask = 1 << (i - 1);
          var q = +quadkey[z - i];
          if (q === 1) x |= mask;
          if (q === 2) y |= mask;
          if (q === 3) {
              x |= mask;
              y |= mask;
          }
      }
      return [x, y, z];
  }
docs: Get the tile for a quadkey
  
  @name quadkeyToTile
  @param {string} quadkey
  @returns {Array<number>} tile
  @example
  var tile = quadkeyToTile('00001033')
  //=tile