The Reference Elevation Model of Antarctica
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Published:2019-02-26
Issue:2
Volume:13
Page:665-674
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ISSN:1994-0424
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Container-title:The Cryosphere
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language:en
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Short-container-title:The Cryosphere
Author:
Howat Ian M., Porter Claire, Smith Benjamin E.ORCID, Noh Myoung-Jong, Morin Paul
Abstract
Abstract. The Reference Elevation Model of Antarctica (REMA) is the
first continental-scale digital elevation model (DEM) at a resolution of
less than 10 m. REMA is created from stereophotogrammetry with submeter
resolution optical, commercial satellite imagery. The higher spatial and
radiometric resolutions of this imagery enable high-quality surface
extraction over the low-contrast ice sheet surface. The DEMs are registered
to satellite radar and laser altimetry and are mosaicked to provide a
continuous surface covering nearly 95 % the entire continent. The mosaic
includes an error estimate and a time stamp, enabling change measurement.
Typical elevation errors are less than 1 m, as validated by the
comparison to airborne laser altimetry. REMA provides a powerful new
resource for Antarctic science and provides a proof of concept for
generating accurate high-resolution repeat topography at continental
scales.
Funder
Office of Polar Programs
Publisher
Copernicus GmbH
Subject
Earth-Surface Processes,Water Science and Technology
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