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The Cryosphere An interactive open-access journal of the European Geosciences Union
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Volume 8, issue 4
The Cryosphere, 8, 1509-1518, 2014
https://doi.org/10.5194/tc-8-1509-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
The Cryosphere, 8, 1509-1518, 2014
https://doi.org/10.5194/tc-8-1509-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 19 Aug 2014

Research article | 19 Aug 2014

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

I. M. Howat1, A. Negrete1, and B. E. Smith2 I. M. Howat et al.
  • 1Byrd Polar Research Center and School of Earth Sciences, Ohio State University, Columbus, OH, USA
  • 2Polar Sciences Center, Applied Physics Lab., University of Washington, Seattle, WA, USA

Abstract. 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.

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