private static void showSquareBorder(String worldName, BorderData border)
	{
		if (roundBorders.containsKey(worldName))
			removeBorder(worldName);

		// corners of the square border
		double[] xVals = {border.getX() - border.getRadiusX(), border.getX() + border.getRadiusX()};
		double[] zVals = {border.getZ() - border.getRadiusZ(), border.getZ() + border.getRadiusZ()};

		AreaMarker marker = squareBorders.get(worldName);
		if (marker == null)
		{
			marker = markSet.createAreaMarker("worldborder_"+worldName, Config.DynmapMessage(), false, worldName, xVals, zVals, true);
			marker.setLineStyle(3, 1.0, 0xFF0000);
			marker.setFillStyle(0.0, 0x000000);
			squareBorders.put(worldName, marker);
		}
		else
		{
			marker.setCornerLocations(xVals, zVals);
		}
	}