Left: rms of slope differences between LDEMs and SDEMs at different baselines (median and interquartile range of all regions). As expected, differences are larger at shorter scales, where LOLA coverage is sparser. Right: LDEMs exhibit a larger surface area of smooth terrain (slope <20°) than SDEMs, especially at shorter baselines, as expected by the relatively sparse LOLA coverage and the additional high-resolution signal extracted from NAC images.