The Greenland Ice Mapping Project (GIMP) land classification and surface elevation data sets

• Published in: The Cryosphere
• Main Authors: I. M. Howat, A. Negrete, B. E. Smith
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus Publications 2014
• Subjects: geo; info; Greenland; Ice Sheet; The Cryosphere
• Online Access: https://doi.org/10.5194/tc-8-1509-2014; http://www.the-cryosphere.net/8/1509/2014/tc-8-1509-2014.pdf; https://doaj.org/article/018db6e185974217af14944ec5a34df4

As part of the Greenland Ice Mapping Project (GIMP) we have produced three geospatial data sets for the entire ice sheet and periphery. These are (1) a complete, 15 m resolution image mosaic, (2) ice-covered and ice-free terrain classification masks, also posted to 15 m resolution, and (3) a complete, altimeter-registered digital elevation model posted at 30 m. The image mosaic was created from a combination of Landsat-7 and RADARSAT-1 imagery acquired between 1999 and 2002. Each pixel in the image is stamped with the acquisition date and geo-registration error to facilitate change detection. This mosaic was then used to manually produce complete ice-covered and ice-free land classification masks. Finally, we used satellite altimetry and stereo-photogrammetric digital elevation models (DEMs) to enhance an existing DEM for Greenland, substantially improving resolution and accuracy over the ice margin and periphery.