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https://2020.stateofthemap.org/sessions/YHEMFS/ Assessing Global OpenStreetMap building completeness to generate large-scale 3D city models The global OpenStreetMap conference. July 4 - 5 July, 2020 online (was planed to take place in Cape Town, South Africa). 3d city modelslarge scaleassessingglobalopenstreetmap https://3u3d.edpsciences.org/ 3U3D - Usage, Usability, and Utility of 3D City Models 3U3D - Usage, Usability, and Utility of 3D City 3d city modelsusageusabilityutility https://www.ogc.org/standards/cityjson/ CityJSON Standard – JSON Format for 3D City Models Mar 24, 2026 - Explore the CityJSON standard, a JSON-based format for easy-to-use exchange of 3D city and landscape models, implementing a subset of the CityGML data model. 3d city modelsjson formatstandard