     for tile_key in tile_keys
       @_draw_tile(tile_key)
     @map_canvas.restore()
-
-  _update_current: () ->
-    current_tiles = []
-    for key, tile_obj of @tile_provider.tiles
-      if tile_obj.current? and tile_obj.current
-        current_tiles.push(key)
-    @_render_tiles(current_tiles)
 
   _prefetch_tiles: () =>
     extent = @get_extent()

    if @prefetch_timer?
      clearTimeout(@prefetch_timer)

    @render_timer = setTimeout(@_update, 100)
    @prefetch_timer = setTimeout(@_prefetch_tiles, 500)

  _draw_tile: (tile_key) ->

        else
          @_create_tile(cx, cy, cz, cbounds, true)

  _update: (abridged=false) =>

    if window.stop?
      window.stop()
