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New encoding for CityGML v3 can be used to store and exchange 3D city models in the GML format as data sets or via web services. Cityscape at night reflected on water Contact: info@ogc.org 28 September 2022: The Open Geospatial Consortium (OGC) seeks public comment on the OGC City Geography Markup Language (CityGML) 3.0 Part 2: GML Encoding Standard. Comments are due by November 11, 2022. The CityGML 3.0 GML Encoding Standard presents the GML encoding of the concepts defined by the CityGML 3.0 Part 1: Conceptual Model (CM) Standard, which was approved as an OGC Standard in 2021. The GML encoding is compliant to GML versions 3.2 and 3.3, which is defined by ISO 19136. This encoding can be used to store and exchange 3D city models in the GML format as data sets or via web services. Since its first publication by OGC in 2008, CityGML has been an open standard used for the storage and exchange of virtual 3D city models. CityGML allows the integration of urban geodata for use across a variety of applications, including urban and landscape planning; Urban Digital Twins for Smart Cities; the Metaverse; Building Information Modeling (BIM); mobile telecommunication; disaster management; 3D cadastre; tourism; vehicle & pedestrian navigation; autonomous driving and driving assistance; facility management; and energy, traffic, and environmental simulations. CityGML defines a "City" in a broad fashion to comprise not just built structures, but also elevation, vegetation, water bodies, city furniture, and more. Despite its name, CityGML is useful for large areas and small regions, not just cities, and can represent the terrain and 3D objects in different Levels Of Detail simultaneously. CityGML enables the consistent representation of 3D urban objects across different Geographic Information Systems and users. CityGML 3.0 is an evolution of the previous versions 1.0 and 2.0 of CityGML that further enables the cost-effective sustainable maintenance of 3D city models. While previous versions standardized a GML exchange format, CityGML 3.0 standardizes the underlying information model and can thus be implemented in a variety of technologies beyond GML. As a result, governments and companies can increase the Return On Investment (ROI) of their 3D city models by being able to put the same models into play across different technology platforms and application fields. Additional benefits of CityGML 3.0 compared to previous versions include much better integration with BIM, the ability to represent indoor spaces in different Levels of Detail (LOD), support for dynamic sensor data, and the capability to extend the information model into Application Domain Extensions using Model Driven Architecture tools. This Part 2 of the Standard defines how the concepts developed in Part 1 are realized using XML and GML technologies. The CityGML 3.0 GML encoding represents a full mapping of the Conceptual Model and is derived fully automatically from the UML model following the UML-to-GML encoding rules as defined by ISO 19136. A collection of example data sets for the CityGML 3.0 GML Encoding is available from the OGC CityGML-3.0 Encodings Public GitHub Repository. OGC Members interested in staying up to date on the progress of this standard, or contributing to its development, are encouraged to join the CityGML SWG via the OGC Portal. The candidate OGC City Geography Markup Language (CityGML) 3.0 Part 2: GML Encoding Standard is available for review and comment on the OGC Portal. Comments are due by November 11, 2022, and should be submitted via the method outlined on the CityGML 3.0 Part 2: GML Encoding Standard's public comment request page. About OGC The Open Geospatial Consortium (OGC) is a collective problem-solving community of more than 550 experts representing industry, government, research and academia, collaborating to make geospatial (location) information and services FAIR – Findable, Accessible, Interoperable, and Reusable. The global OGC Community engages in a mix of activities related to location-based technologies: developing consensus-based open standards and best-practices; collaborating on problem solving in agile innovation initiatives; participating in member meetings, events, and workshops; and more. OGC's unique standards development process moves at the pace of innovation, with constant input from technology forecasting, practical prototyping, real-world testing, and community engagement. OGC bridges disparate sectors, domains, and technology trends, and encourages the cross-pollination of ideas between different communities of practice to improve decision-making at all levels. OGC is committed to creating an inclusive and sustainable future. Visit ogc.org for more info on our work.

V2 supports “tile set metadata” that can be used to describe common properties of a tile set, the layers & styles used to produce the tile set, and the limits of the tile matrix. Contact: info@ogc.org 29 September 2022: The Open Geospatial Consortium (OGC) is excited to announce that the OGC Membership has approved Version 2.0 ....

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