Abstract
Abstract. CityGML is an international standard issued by the Open Geospatial Consortium (OGC) for representing and exchanging Semantic 3D City Models. Due to their large scale and deeply nested structures, the management and visualization of CityGML based models require sophisticated solutions such as the 3D City Database (3DCityDB). The research work presented in this article proposes a high level architecture for extending the 3D City Database to store and manage dynamic properties encoded within a new Application Domain Extension (ADE) of CityGML called Dynamizer ADE. The implementation employs the 3DCityDB 4.2 ADE Plugin Manager, which provides an automatic way for dynamically extending the 3DCityDB to support the storage and management of CityGML models with ADEs. The paper introduces a relational database model for storing and managing the Dynamizer ADE within the 3DCityDB. Further, the research work includes the extension of the 3DCityDB Importer/Exporter in order to import and export CityGML documents including Dynamizer ADE data. 3DCityDB already comes with a Web Feature Service (WFS) interface allowing CityGML features to be requested in standardized ways. The proposed framework enables CityGML Viewers to access static data (using OGC WFS interface) and dynamic data (using the OGC SWE interfaces) in an integrated fashion.
Highlights
AND MOTIVATIONCityGML (Groger et al, 2012) is an international standard issued by the Open Geospatial Consortium (OGC), which allows representing and exchanging Semantic 3D City Models
The architecture extends the 3D City Database (3DCityDB) to store and manage dynamic properties encoded within the CityGML Dynamizer Application Domain Extension (ADE)
The advantage of keeping the Timeseries module separate from the Dynamizer module is that this approach allows making the Timeseries module re-usable, for example, by storing timeseries from other ADEs such as the Energy ADE
Summary
CityGML (Groger et al, 2012) is an international standard issued by the Open Geospatial Consortium (OGC), which allows representing and exchanging Semantic 3D City Models. The research work includes the extension of the 3DCityDB Importer/Exporter in order to import and export CityGML documents including Dynamizer ADE data This enables managing dynamic data (such as time points within timeseries) associated with city objects, which can further be queried and used with standard SQL operations. The proposed architecture enables CityGML applications to query and visualize static data (using OGC WFS interface) and dynamic data (using standardized interfaces) in an integrated fashion For this purpose, the Open Source InterSensor Service (c.f. section 2.3) has been extended to connect to the Dynamizer ADE stored in the 3DCityDB and encode the respective dynamic properties according to the open and international standards
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