The mapping exercise aims at identifying important projects, actors and interaction platforms in the three fields of action sustainable energy, sustainable mobility and sustainable urban development. In order to prepare the subsequent interaction analyses, an understanding of the relationships between the actors active in the field of action must be developed. For this purpose, a combination of qualitative and quantitative methods will be used. Open source databases and online documentations will be used to identify actors and topics. On this basis, the research group will identify and categorise further contacts, projects and platforms. Twitter data will be evaluated to analyse the network structures of peer communities. Through the combination of expert interviews and workshop discussions with quantitative methods, we aim to identify the relevant communities in the respective field of action and gain a deeper understanding of typical communication channels, interaction patterns, rules and coordination instruments.