The accuracy of digital elevation models of the Antarctic continent
The accuracy of two widely used digital elevation models of Antarctica was assessed using data from the Geoscience Laser Altimeter System onboard ICESat. The digital elevation models were derived from satellite radar altimeter and terrestrial data sets. The first, termed JLB97, was produced predomin...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:113781 2023-05-15T13:36:38+02:00 The accuracy of digital elevation models of the Antarctic continent Bamber, J Gomez-Dans, JL 2005-09-15 http://discovery.ucl.ac.uk/113781/ unknown ELSEVIER SCIENCE BV EARTH PLANET SC LETT , 237 (3-4) 516 - 523. (2005) Antarctica digital elevation model satellite altimetry ICESat ALTIMETER DATA MASS-BALANCE ICE SHEETS POLAR ICE GREENLAND Article 2005 ftucl 2016-01-15T02:50:34Z The accuracy of two widely used digital elevation models of Antarctica was assessed using data from the Geoscience Laser Altimeter System onboard ICESat. The digital elevation models were derived from satellite radar altimeter and terrestrial data sets. The first, termed JLB97, was produced predominantly from ERS-1 data while the second, termed, RAMPv2 included other sources of data in areas of high relief and poor coverage by ERS-1. The accuracy of the models was examined as a function of surface slope and original data source. Large errors, in excess of 100 m, were ubiquitous in both models in areas where terrestrially-derived elevation data had been used but were more extensive in RAMPv2. Elsewhere, the systematic error (bias) was found to be a monotonic function of slope for JL1397, with a more complex, less predictable bias for RAMPv2. The magnitude of the global, slope-dependent, bias ranged from less than a metre to slightly over 10 m but with much larger regional deviations. The random error ranged from about 1 m to over 100 m depending on the DEM and slope. The random error was consistently over a factor two larger for RAMPv2 compared to JL1397. (c) 2005 Elsevier B.V. All rights reserved. Article in Journal/Newspaper Antarc* Antarctic Antarctica Greenland University College London: UCL Discovery Antarctic Greenland The Antarctic |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
unknown |
topic |
Antarctica digital elevation model satellite altimetry ICESat ALTIMETER DATA MASS-BALANCE ICE SHEETS POLAR ICE GREENLAND |
spellingShingle |
Antarctica digital elevation model satellite altimetry ICESat ALTIMETER DATA MASS-BALANCE ICE SHEETS POLAR ICE GREENLAND Bamber, J Gomez-Dans, JL The accuracy of digital elevation models of the Antarctic continent |
topic_facet |
Antarctica digital elevation model satellite altimetry ICESat ALTIMETER DATA MASS-BALANCE ICE SHEETS POLAR ICE GREENLAND |
description |
The accuracy of two widely used digital elevation models of Antarctica was assessed using data from the Geoscience Laser Altimeter System onboard ICESat. The digital elevation models were derived from satellite radar altimeter and terrestrial data sets. The first, termed JLB97, was produced predominantly from ERS-1 data while the second, termed, RAMPv2 included other sources of data in areas of high relief and poor coverage by ERS-1. The accuracy of the models was examined as a function of surface slope and original data source. Large errors, in excess of 100 m, were ubiquitous in both models in areas where terrestrially-derived elevation data had been used but were more extensive in RAMPv2. Elsewhere, the systematic error (bias) was found to be a monotonic function of slope for JL1397, with a more complex, less predictable bias for RAMPv2. The magnitude of the global, slope-dependent, bias ranged from less than a metre to slightly over 10 m but with much larger regional deviations. The random error ranged from about 1 m to over 100 m depending on the DEM and slope. The random error was consistently over a factor two larger for RAMPv2 compared to JL1397. (c) 2005 Elsevier B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Bamber, J Gomez-Dans, JL |
author_facet |
Bamber, J Gomez-Dans, JL |
author_sort |
Bamber, J |
title |
The accuracy of digital elevation models of the Antarctic continent |
title_short |
The accuracy of digital elevation models of the Antarctic continent |
title_full |
The accuracy of digital elevation models of the Antarctic continent |
title_fullStr |
The accuracy of digital elevation models of the Antarctic continent |
title_full_unstemmed |
The accuracy of digital elevation models of the Antarctic continent |
title_sort |
accuracy of digital elevation models of the antarctic continent |
publisher |
ELSEVIER SCIENCE BV |
publishDate |
2005 |
url |
http://discovery.ucl.ac.uk/113781/ |
geographic |
Antarctic Greenland The Antarctic |
geographic_facet |
Antarctic Greenland The Antarctic |
genre |
Antarc* Antarctic Antarctica Greenland |
genre_facet |
Antarc* Antarctic Antarctica Greenland |
op_source |
EARTH PLANET SC LETT , 237 (3-4) 516 - 523. (2005) |
_version_ |
1766081971289587712 |