Here is the slope map of Greenland computed from the surface elevation map. Note that Greenland is basically very flat -- a logarithmic color scale is needed to display subtle differences. However colors chosen by the authors did not do that very well so I re-worked the image in Gimp using the Hue tool, keeping both the native resolution provided to the journal (for which a pdf image extractor is needed) and staying within the blog's 700 pixel width constraint so it will display without compression.
Except it doesn't -- the blog has a secret file size maximum and so it needs a click to open separately and another click after that to reach full size 690 x 1299. It cannot be compressed further as jpg (like the image above, just 193k) without ruining its value.
Guessing that it cost $25,000,000 of science dollars to generate this image or $30 per pixel, every dot counts. I believe the authors submitted it to the journal at full experimental ground resolution (though they flattened coastline and lat,lon on top their precious data). It's very expensive data to throw away if at the very end it has to be displayed as here at 1/3 its size.
Below the blog software has taken it upon itself to replace the user-submitted image with their own jpg_thumb.png without warning or prior approval -- an unacceptable coding practice, because saving the image to desktop then saves the wrong file.
Elevation and elevation change of Greenland and Antarctica derived from CryoSat-2
V. Helm, A. Humbert, and H. Miller
http://www.the-cryosphere.net/8/1539/2014/