Subgroup 1 was in charge of a common terminology and analytical basis to facilitate cooperation of experts from different domains. It is doing so by reviewing existing terminology and its use in literature in order to propose a consistent set of terms which also matches with the analytical basis of geomorphometry. Its task is furthermore to review the methodological developments in SG2 in order to ensure their coherence and consistency with the agreed set of definitions.

Fig. Schematic view of surfaces as interfaces between different spheres on the Earth Surface (from P. Guth, 2021)

The subgroup has published a peer-reviewed paper in support of its mandate:

Digital Elevation Models: Terminology and Definitions, P. Guth et al., Remote Sens., 13(18), 3581, 2021.