This joint workshop provides an opportunity to gather requirements, ideas, suggestions, and positive as well as negative experience from CityGML users, data producers, software vendors, and scientists developing and using both, the CityGML Utility Network ADE and the CityGML Energy ADE. | This joint workshop provides an opportunity to gather requirements, ideas, suggestions, and positive as well as negative experience from CityGML users, data producers, software vendors, and scientists developing and using both, the CityGML Utility Network ADE and the CityGML Energy ADE. |