3D printing Hofburg Vienna

From the data of the generalised roof model (LOD2) of the city of Vienna, the city of Oldenburg issued the Vienna Hofburg with a 3D printer. The STL file was provided by the city of Oldenburg for further uses本数据集源自维也纳市的广义屋顶模型（LOD2）数据。奥尔登堡市依托该数据集，通过3D打印机制作了维也纳霍夫堡宫的实体模型，并提供了对应的STL文件以供后续使用。