FreerailsTile ft = world.getTile(X, Y); BuildingType bt = (BuildingType) world.get(KEY.BUILDING_TYPES, ft.getBuildingTile().getType(), Player.AUTHORITATIVE); supplyDemandViewer.setLocation(X, Y, bt.getStationRadius());
    CalcCargoSupplyRateAtStation(ReadOnlyWorld world, int X, int Y) {	w = world;	supplyDemandViewer = new SupplyDemandViewer(world);    }