GAIA Data is an eight-year Equipex+ PIA3 project supported by three research infrastructures (Data Terra, PNDB and Climeri-France). It aims to develop and implement an integrated, distributed platform of services and data for observing, modelling and understanding the Earth system, biodiversity and the Environment. Intended for the scientific community as well as public and socio-economic players, these services will be accessible via portals enabling inter- and trans-disciplinary research and will be based on multi-source data.