void readVolumetricData(boolean isMapData) {
		try {
			readVoxelData(isMapData);
			if (isJvxl && jvxlEdgeDataCount > 0)
				jvxlEdgeDataRead = jvxlReadData("edge", jvxlEdgeDataCount);
			if (isJvxl && jvxlColorDataCount > 0)
				jvxlColorDataRead = jvxlReadData("color", jvxlColorDataCount);

		}
		catch (Exception e) {
			Logger.error(null, e);
			throw new NullPointerException();
		}
	}