The development of the next major version 3.0 of the international OGC standard CityGML is nearing its end. CityGML 3.0 will come up with a variety of new features and revisions of existing modules that will increase the usability of CityGML for more user groups and areas of application. This includes a new space concept, a revised level-of-detail (LOD) concept, the representation of time-dependent properties, the possibility to manage multiple versions of cities, the representation of city objects by point clouds, an improved modelling of constructions, the representation of building units and storeys, an improved representation of traffic infrastructure as well as a clear separation of the conceptual model and the data encodings that allow for providing further encoding specifications besides GML. This paper gives an overview of these new and revised concepts, and illustrates their application through selected use cases.

国际OGC标准CityGML的下一个主要版本3.0的开发即将结束。CityGML 3.0将提供各种新功能和现有模块的修订版，这将增加CityGML在更多用户群和应用领域中的可用性。其中包括新的空间概念，修订的详细程度（LOD）概念，表示随时间变化的属性，管理多个城市版本的可能性，通过点云表示城市对象，改进的建筑模型，建筑单位和楼层的表示形式，交通基础设施的改进表示形式以及概念模型和数据编码的明确分离，从而可以提供除GML之外的其他编码规范。