Vertical accuracy assessment of the Copernicus DEM for EGYPT

The comparison of 4721 high accuracy DGPS reference points collected from different locations at Egypt and at different altitude/slopes confirm the absolute vertical accuracy of Copernicus DEM to be < 4 meters.

The average of the vertical shift about -0.19m with 1.44 Standard Deviation, and the slope of this points ranges from 0 to 32 degree and the points elevation ranges from 6 to 781 meters above sea level.

Statistical results of 4721 reference points
Comparison between Elevation from CopDEM and DGPS for sample of 100 reference points for low terrain changes
Relation between vertical shift and slope in degree for sample of 100 reference points
Comparison between Elevation from CopDEM and DGPS for sample of 100 reference points for high terrain changes

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