 
   display_defaults: ->
     return _.extend {}, super(), {
-      level: 'glyph'
       tile_provider: "WMTSTileProvider"
       url: "http://c.tile.openstreetmap.org/{Z}/{X}/{Y}.png"
       tile_size: 256

    for ty in [tymax..tymin] by -1
      for tx in [txmin..txmax] by 1
        tiles.push([tx, ty, level, @get_tile_meter_bounds(tx, ty, level)])

        tiles = @sort_tiles_from_center(tiles, [txmin, tymin, txmax, tymax])

    return tiles

  quadkey_to_tile_xyz: (quadKey) ->

    return tile

  _render: (ctx, indices, {url, image, need_load, sx, sy, sw, sh, angle}) ->

    console.warn("RENDER: " + this.tile_provider.url)

    @_update(abridged=true)

