BIM and GIS for district modeling

Many researchers are exploring Building Information Modeling and Geographical Information System to try to create a graphical database able to collect data about landscape, city, utilities, buildings, etc. This paper aims to investigate the way to link BIM and GIS to connect information belonging to different systems that characterize in a different way the same objects. So, interoperability between different environments, software and professionals plays a key role to provide a great contribution for the DIMMER project, where the development of a District Information Model is related to manage data about energy saving