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May 19th, 2014
The OGC Seeks Public Participation in Development of CityGML 3.0

CityGML is a comprehensive open data model framework and XML-based encoding standard for the modeling, storage, and exchange of virtual 3D city and landscape models. In 2008 it was adopted by the OGC membership as an international OGC standard. CityGML is being implemented across Europe, Canada, the Middle East and Asia. It has even been adopted by several countries including The Netherlands and Germany as an official national and municipal 3D geo information standard, and it has been adapted as part of the European Union’s common spatial data infrastructure INSPIRE.

CityGML is implemented as an application schema of the OGC Geography Markup Language 3 (GML3) Encoding Standard (http://www.opengeospatial.org/standards/gml), an international standard for spatial data exchange and encoding approved by the OGC and ISO.

Since the release of CityGML 2.0, a number of CityGML change requests have been submitted to the OGC. In June 2013, further requirements and ideas guiding the development of CityGML 3.0 were gathered and discussed at an international workshop jointly hosted by the OGC and the Special Interest Group 3D (SIG 3D). All presentation slides and the minutes of the workshop are available here: http://en.wiki.modeling.sig3d.de/index.php/Workshop_Munich_2013 . The outcomes of this ongoing discussion are formally captured in a list of work packages that define the overall work scope for CityGML 3.0. Examples of the identified work include changes to CityGML’s level-of-detail concept, additional semantic model structures such as building storeys, floor plans and utility networks, as well as new complex attributes such as time series and metadata. To the extent feasible, new features will minimize impacts on backwards compatibility that might affect the many communities using the current version of CityGML.

The OGC solicits input and expertise from CityGML users, data producers, software vendors, and scientists in order to identify participants willing to contribute to and able to assume ownership for the work of the work packages under the joint leadership of the OGC CityGML Standard Working Group (SWG) and the SIG 3D. This call explicitly includes non-OGC members. Active participation in the CityGML 3.0 development process does not require OGC membership. To be most effective, organizations and individuals responding to this CFP should plan to fully participate in the CityGML 3.0 development activities.

Responses to the CFP are requested by the time of the 10 June 2014 kickoff of CityGML 3.0 development at the OGC Technical Committee meeting in Geneva, Switzerland. Note, however, that this CFP will remain open for the duration of the CityGML 3.0 development process.

All OGC standards are free and publicly available.

The OGC is an international consortium of more than 475 companies, government agencies, research organizations, and universities participating in a consensus process to develop publicly available geospatial standards. OGC Standards support interoperable solutions that “geo-enable” the Web, wireless and location-based services, and mainstream IT. OGC Standards empower technology developers to make geospatial information and services accessible and useful with any application that needs to be geospatially enabled. Visit the OGC website at http://www.opengeospatial.org/contact.