docs: public void init(Envelope maxExtent, double scale) {
  		double[] layerSize = TileUtil.getTileLayerSize(code, maxExtent, scale);
  		tileWidth = layerSize[0];
  		tileHeight = layerSize[1];
  		int[] screenSize = TileUtil.getTileScreenSize(layerSize, scale);
  		screenWidth = screenSize[0];
  		screenHeight = screenSize[1];
  		bounds = TileUtil.getTileBounds(code, maxExtent, scale);
  	}