CityGML Challenge


The Open Geospatial Consortium (OGC) CityGML model has been successfully used in a number of city models in different parts of the world. Presently there is a new version being developed and the draft specification publicly available on GitHub will be utilized as part of this challenge.

Sponsored by OGC Strategic Member, Ordnance Survey (OS), the CityGML Challenge will encourage the configuration of software tools to visualise CityGML data. CityGML is an open data model and XML-based format for the storage and exchange of virtual 3D city models. The challenge is focused on the UK city of Manchester. OS is supporting Manchester City Council in the delivery of the Triangulum Project - funded by the European Commission (EC) - and has collated a range of data resources relating to the geography of Manchester’s Oxford Road Corridor in the form of a data model in the draft CityGML 3 standard.?

Triangulum is focused on replicable smart city solutions and frameworks relating to sustainable energy, mobility, and ICT. A range of low-carbon technologies have been implemented in the Oxford Road Corridor, and OS is sponsoring this challenge in collaboration with both Manchester City Council and OGC to support the incubation of mobility and energy innovations.



We are encouraging software developers to configure visualisation software tools to support the capabilities of version 3 of CityGML, including dynamic data feeds from a range of sensors. The resulting tools and visualisation environment are to be made openly available for one year for wider experimentation and innovation purposes, in particular as part of an Innovation Challenge focused on energy and mobility applications, held as part of the Triangulum Project. Applicants are encouraged to consider a range of visualisation options, including augmented and virtual reality.

The expectation is that this visualisation will operate from a database representation of the City Model that conforms to the CityGML 3 conceptual model, and will not be not dependent on any of the CityGML encodings.

Additional data will be loaded or directly accessed from APIs.

The assumption is that one or more web services will provide that data to visualisation clients in browsers, mobile devices, and augmented reality / virtual reality equipment.

Follow along at #CityGMLChallenge



Requirements document


Any?questions and/or expressions of interest to participate in the challenge should be directed to techdesk [at]



Applicants to this challenge will be invited to present their visualisation tools at a judging event to take place in Manchester on Thursday 24 October, 2019. The winner will benefit from:

  • A £5,000 cash prize.
  • Showcasing of the tool at subsequent OGC Technical Meetings.
  • Recognition from having their tool used as a key resource for the Triangulum innovation challenge.



  • 7 August and 5 September - Webinars to explain the available data resources for the challenge?(info on joining the webinars TBA)
  • 1 October - All submissions must be complete
  • 24 October - CityGML Challenge Judging and Award Ceremony in person in Manchester with winner to be selected on this day
  • 18 November - OGC TC/PC Meetings in France (opportunity for the winner to present in the Opening Plenary)
  • 27-28 November - Manchester City Council launch of Innovation Challenge, for which the winner's visualisation will be a key resource.