Columbia (Alaska)

Located in Alaska (61°12‘02”N 146°54‘17”W), RGI60-01.10689.

The sources available are: ASTER, Alaska DEM, COPDEM, AW3D30, DEM3, ArcticDEM, TanDEM-X and MAPZEN.

Summary

  • ASTER (when it has no gaps, which is the case here) is noisy over flat glacier surfaces (north-east of the glacier)
  • DEM3 is obviously based on ASTER but is smoother
  • clear differences between ASTER and the newer products (TanDEM-X, ArcticDEM) might be due to mass-loss, although it seems exaggerated
  • it is one of the cases where ArctiDEM has too many data gaps
  • AW3D30 also hast way to many gaps
  • Both Alaska and Copernicus DEM are without visual problems and compareable besides some differences in the tongue area.

Maps

../_images/dem_topo_color1.png

Shaded relief

../_images/dem_topo_shade1.png

Differences

../_images/dem_diffs1.png

Scatter plots

These scatter plots are for the glacier area only.

../_images/dem_scatter1.png