A combined approach was implemented, including a GNSS system installed in proximity of a future gas production well site and an ADInSAR (Advanced Satellite SAR Interferometry) historical analysis, to ensure the characterization of the area in terms of subsidence and allow a continuous monitoring of the area in preparation of the production phase and possible subsidence induced effects at surface. In addition, the installation of other GNSS systems and of a set of corner reflectors is planned over the area in the near future, during the phase 2 of the work.