This OGC Discussion Paper introduces the CityGML Urban Planning Application Domain Extension (ADE) published by the Japanese government for the "i-Urban Revitalization" (i-UR). The i-UR is an information infrastructure dedicated for urban planning to contribute to data-driven urban development and urban revitalization. OGC KML has been utilized more than 10 years for i- UR, however, there were huge requirements for use of application-specific semantics information for urban planning and multi-scale structured information by LOD (Levels of Detail). By using CityGML ADE mechanism, the Urban Planning ADE provides application-specific semantics information integrating with 3D geometry data to visualize and analyze the urban situation. Additionally, the Urban Planning ADE introduces newly extended LOD, LOD-1 (minus one) for nationwide city models and LOD-2 (minus two) for a worldwide city model to visualize global urban activities and study urban structure by integrating geospatial information and statistical grid information. This paper describes a brief introduction of i-Urban Revitalization, data model of the Urban Planning ADE and data experiment examples to discuss further utilization of the Urban Planning ADE in urban planning applications.     «

This OGC Discussion Paper introduces the CityGML Urban Planning Application Domain Extension (ADE) published by the Japanese government for the "i-Urban Revitalization" (i-UR). The i-UR is an information infrastructure dedicated for urban planning to contribute to data-driven urban development and urban revitalization. OGC KML has been utilized more than 10 years for i- UR, however, there were huge requirements for use of application-specific semantics information for urban planning and multi...     »