• (24th of June 2008): The presentation slides from the OGC Interoperability Day on the 3rd of June 2008 are available in the corresponding resources section.
• (13th of June 2008): The final vote on CityGML 1.0 for adoption as OGC International Standard has been launched within the OGC Technical Committee. The adaption vote coincides with a 60 day Intellectual Property Rights (IPR) consideration period, and thus is due by August 12, 2008.
• (19th of May 2008): The OGC has announced the next OGC Interoperability Days to be held on Tuesday and Wednesday, June 3 and 4, 2008, in Potsdam, Germany (official OGC press release). CityGML will be an agenda highlight for the Technical Interoperability Day on Tuesday. The SIG 3D has been granted a considerable time slot for presentations and real world examples on CityGML. The OGC Interoperability Days are open both for OGC members and non OGC members. On both days, attendance is free and attendees will have opportunities to attend company and project presentations. Detailed program and registration information are available at www.opengeospatial.org/event/080603techinterop and www.opengeospatial.org/event/080604interop. Please note, that registration is free, but attendees must register separately for each day. The event will be held at GFZ Potsdam, Telegrafenberg 326, 14473 Potsdam, www.gfz-potsdam.de
• (20th of February 2008): The OGC has opened the 30-days public comment phase on the candidate CityGML version 1.0 Encoding Standard (official OGC press release). The public is thereby requested to submit comments on the draft CityGML version 1.0 specification to the OGC. The corresponding Request for Comment (RFC) can be downloaded from www.opengeospatial.org/standards/requests/47. Comments are due by March 20, 2008.
• A new report of the working group on "City model updating and continuation" of the SIG 3D is available (in German, download)
• The CityGML Standards Working Group (CityGML SWG) was launched in December 2007 within OGC. The aim of the SWG is to advance the best practice document to an adopted OGC standard. The next step is the preparation of the RFC process which is scheduled for February 2008.
• (4th of December 2007): A range of CityGML tutorials and courses will be given in 2008:
  • EuroSDR EduServ6 with an introductory meeting in Stuttgart, Germany, on March 6th-7th and two weeks of distance E-learning course in May 19th-30th (further information)
  • 3rd ISPRS Summer School on June 29th in Nanjing, China (further information)
  • Runder Tisch GIS on February, 26th in Munich, Germany (in German; further information)
  • Jahrestagung der Deutschen Gesellschaft für Photogrammetrie und Fernerkundung on April 23th in Oldenburg, Germany (in German; further information)
• (28th of November 2007): We have moved citygml.org to a new server with a content management system. XML validation of CityGML testdata files will be possible again shortly (the repository www.citygml.org/citygml/1/0/0/CityGML.xsd is not setup yet).
• (9th of September 2007): Since July 2007, CityGML is an OGC adopted Best Practice Paper! At the July meeting in Paris the OGC Technical Committee approved the CityGML Specification version 0.4.0 as an OGC Best Practice Paper. Therefore, CityGML is an official position of the OGC membership on 3D city modelling. The Specification document (OGC Document No. 07-062, PDF 9.8 MB) can be freely downloaded from the Best Practices Paper section of the Open Geospatial Consortium website. CityGML is discussed both in SIG 3D and the OGC 3DIM working group (formerly known as the CAD/GIS Interoperability WG).
• The XML application schema for version 0.4.0 is available for download.
• A Change Document tracking the changes from the previous CityGML version 0.3.0 to CityGML version 0.4.0 is available.
• A new CityGML Wiki (www.citygmlwiki.org) has been launched. The Wiki is a community documentation and communication platform. Research projects & institutes, commercial & free implementations, and much more can be found there - and added by anybody. Please provide information about your CityGML related projects, publications, and products, too!
• An online documentation of the CityGML 0.4.0 XML schema document is available. Also the current UML diagrams are available for download.
• The CityGML specification 0.3.0 is the most downloaded OGC Discussion Paper so far! (Information from Carl Reed, OGC)
• CityGML was extensively used and evaluated in the OGC Web Services Testbed No. 4 (OWS-4). Results of OWS-4 are documented in a 12 minute video and interactive demo. Experiences and findings of the CAD/GIS/BIM thread within OWS-4 have been documented in an OGC discussion paper (OGC Document No. 07-023r2, PDF 1.2 MB). An OGC press release about the results of the CAD/GIS/BIM thread was published on 2007-06-25.
• Two OGC Web Feature Services (one WFS using Snowflake GoPublisher, one WFS-T using the deegree framework) serving CityGML datasets are online and publicly accessible. Use these WFS to test web services based access to 3D city models! The Aristoteles GML3 viewer provides a WFS interface (see here). Also the company Onuma provides CityGML WFS access to some of their building designs in the US.
• A CityGML tutorial was held in Urumqi, China, beforehand the ISPRS Workshop on "Updating Geo-spatial Databases with Imagery". The presentation (about 100 slides) is available for download below. It contains also a discussion about the relation of CityGML, KML, COLLADA, X3D, and IFC.

Created and maintained by Thomas H. Kolbe
Last update: 2008-06-24