The availability of regional deformation maps generated from differential interferometric synthetic aperture radar (DInSAR) data is rising rapidly, but the use of these products still presents a challenge for many practitioners. Here we present a novel ground motion sensitivity index (GMSI) map that combines information data reliability, measurement sensitivity, and radar visibility. Interferometric coherence provides information about the data reliability; the measurement sensitivity represents the degree to which DInSAR data from the Sentinel-1 satellites are capable of detecting slope-parallel motion; and the radar visibility component identifies areas that are affected by geometric artifacts. Combined into the GMSI index (available for all of Switzerland at 10m resoltuion), these data can serve as a planning tool to evaluate the suitability of an area of interest for DInSAR analyses and support interpretation.