Roads 3D-GIS offersthe advantages of realistic 3D visualization in combination with querying andanalysis tools known from GIS systems公路三维地理信息系统提供了有利于实现3D虚拟化的条件,在著名的地理信息系统中结合了询问和分析工具(or功能)。GIS capabilities were improved andadapted to support the additional dimension specific information.地理信息系统的性能正在提高改善并且适应于支持其它维度的专门信息。...