Access control and reporting at the Data Center for Deep Geothermal Energy

The CDGP [https://cdgp.u-strasbg.fr], Data Center for Deep Geothermal Energy, is a Research repository for deep geothermal data in Alsace (France) originating from academic observatories or industrial providers. It collects seismological (catalogues, waveforms, focal mechanisms), seismic, hydraulic, geological, and all data related to anthropogenic hazard from the different phases of a geothermal project, mainly from the exploration and development stages at Soultz-sous-Forêts, Rittershoffen and Vendenheim EGS geothermal sites. Data are verified, validated, and curated; they are then described with metadata following the ISO 191115/19139 standards and have owner-defined distribution rules associated with them. A persistent Digital Object Identifier (DOI) is associated with the collections as well as a “how to cite” statement, for better citation. Data are converted into standard formats and archived in data warehouses. The CDGP is also a node of the EPOS TCS-AH platform [https://tcs.ah-epos.eu/] and provides Episodes metadata and data.Metadata are open and harvested, they are also pushed on the TCS- AH platform. Data follow FAIR’s statement “as open as possible, as closed as necessary”. CDGP has set an authentication, authorization, and accounting infrastructure (AAAI) to compare distribution rules and user affiliation. Access to data on the TCS-AH platform is conditional on academic membership, and data are provided on-demand. Access controls are made as near the user as possible (subsidiarity principle). Monitoring and reporting are part of the AAAI, and usage is described in terms of use and privacy. Reports are sent to data providers every semester. CDGP operates a regular bibliographic follow-up, e.g. with Google Scholar or by questioning users that downloaded data. On his side, the TCS-AH can only provide general statistics on user engagement, origin, etc.