GPR to constrain ERT data inversion in cavity searching: Theoretical and practical applications in archeology

► ERT and GPR data to characterize cavity linked to a chamber tomb roman in age. ► Ambiguity in the ERT data inversion is reduced with a priory constrain on the boundary of cavity. ► 2-3D ERT data inversion and GPR data to locate the tomb. ► ERT forward modeling to analyze the ambiguity in the data inversion of a cavity merged.