I am interested in the numbers of CityGML models and institutions currently using CityGML in any way. CityGML is a standard of the Open Geospatial Consortium and has been released since 2008 in two versions. Claus Nagel gave an overview of the distribution of CityGML instance models and participating user institutions in 2010 (http://www.3d-stadtmodelle.org/3d-stadtmodelle_2010/14_Nagel_CityGML_international.pdf) . Is there any new information on that topic?

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