The Anthropocene-Quaternary Research Group at the Natural History Museum of Denmark, with the University of Oslo and DTU Space, have compiled a historical medium-resolution DEM and orthophotographs that consistently cover the entire surroundings and margins of the Greenland Ice Sheet 1978–1987. About 3,500 aerial photographs of Greenland are combined with field surveyed geodetic ground control to produce a 25 m gridded DEM and a 2 m black-and-white digital orthophotograph. Supporting data consist of a reliability mask and a photo footprint coverage with recording dates. Through one internal and two external validation tests, the DEM shows an accuracy better than 10 m horizontally and 6 m vertically while the precision is better than 4 m.
The paper describing the data set can be found here at Scientific Data (open access):
http://www.nature.com/articles/sdata201632
And the dataset itself can be retrieved from NOAA NCEI (open access):
http://dx.doi.org/10.7289/V56Q1V72
Best regards,
Niels J. Korsgaard
mail: nielsjk@snm.ku.dk
