Extended Data Fig. 2: Spatial and temporal coverage of ASTER, ArcticDEM and REMA DEMs.
From: Accelerated global glacier mass loss in the early twenty-first century
a–c, Spatial distribution of DEMs as a strip count for ArcticDEM strips above 50° N (a), ASTER DEM strips (b) and REMA strips below 50° S (c), shown on top of a world hillshade36. 67,986 ArcticDEM and 9,369 REMA strips are counted before co-registration to TanDEM-X. This later reduces their number to 40,391 and 3,456, respectively, owing to the limited stable terrain in polar regions. d, Temporal distribution of the strip count as a bi-mensual histogram from January 2000 to December 2019. We note that ArcticDEM and REMA strip footprints (15 km × 50 km) are generally much smaller than ASTER DEM strip footprints (180 km × 60 km).
