A new 100-m Digital Elevation Model of the Antarctic Peninsula derived from ASTER Global DEM: methods and accuracy assessment
A high resolution surface topography Digital Elevation Model (DEM) is required to underpin studies of the complex glacier system on the Antarctic Peninsula. A complete DEM with better than 200 m pixel size and high positional and vertical accuracy would enable mapping of all significant glacial basi...
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ftdoajarticles:oai:doaj.org/article:21de67010dd6497bafcf5441cb21930c 2023-05-15T14:03:57+02:00 A new 100-m Digital Elevation Model of the Antarctic Peninsula derived from ASTER Global DEM: methods and accuracy assessment A. J. Cook T. Murray A. Luckman D. G. Vaughan N. E. Barrand 2012-10-01T00:00:00Z https://doi.org/10.5194/essd-4-129-2012 https://doaj.org/article/21de67010dd6497bafcf5441cb21930c EN eng Copernicus Publications http://www.earth-syst-sci-data.net/4/129/2012/essd-4-129-2012.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 doi:10.5194/essd-4-129-2012 1866-3508 1866-3516 https://doaj.org/article/21de67010dd6497bafcf5441cb21930c Earth System Science Data, Vol 4, Iss 1, Pp 129-142 (2012) Environmental sciences GE1-350 Geology QE1-996.5 article 2012 ftdoajarticles https://doi.org/10.5194/essd-4-129-2012 2022-12-31T14:44:22Z A high resolution surface topography Digital Elevation Model (DEM) is required to underpin studies of the complex glacier system on the Antarctic Peninsula. A complete DEM with better than 200 m pixel size and high positional and vertical accuracy would enable mapping of all significant glacial basins and provide a dataset for glacier morphology analyses. No currently available DEM meets these specifications. We present a new 100-m DEM of the Antarctic Peninsula (63–70° S), based on ASTER Global Digital Elevation Model (GDEM) data. The raw GDEM products are of high-quality on the rugged terrain and coastal-regions of the Antarctic Peninsula and have good geospatial accuracy, but they also contain large errors on ice-covered terrain and we seek to minimise these artefacts. Conventional data correction techniques do not work so we have developed a method that significantly improves the dataset, smoothing the erroneous regions and hence creating a DEM with a pixel size of 100 m that will be suitable for many glaciological applications. We evaluate the new DEM using ICESat-derived elevations, and perform horizontal and vertical accuracy assessments based on GPS positions, SPOT-5 DEMs and the Landsat Image Mosaic of Antarctica (LIMA) imagery. The new DEM has a mean elevation difference of −4 m (± 25 m RMSE) from ICESat (compared to −13 m mean and ±97 m RMSE for the original ASTER GDEM), and a horizontal error of less than 2 pixels, although elevation accuracies are lower on mountain peaks and steep-sided slopes. The correction method significantly reduces errors on low relief slopes and therefore the DEM can be regarded as suitable for topographical studies such as measuring the geometry and ice flow properties of glaciers on the Antarctic Peninsula. The DEM is available for download from the NSIDC website: http://nsidc.org/data/nsidc-0516.html ( doi:10.5060/D47P8W9D ). Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Antarctic Peninsula Earth System Science Data 4 1 129 142 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 A. J. Cook T. Murray A. Luckman D. G. Vaughan N. E. Barrand A new 100-m Digital Elevation Model of the Antarctic Peninsula derived from ASTER Global DEM: methods and accuracy assessment |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
A high resolution surface topography Digital Elevation Model (DEM) is required to underpin studies of the complex glacier system on the Antarctic Peninsula. A complete DEM with better than 200 m pixel size and high positional and vertical accuracy would enable mapping of all significant glacial basins and provide a dataset for glacier morphology analyses. No currently available DEM meets these specifications. We present a new 100-m DEM of the Antarctic Peninsula (63–70° S), based on ASTER Global Digital Elevation Model (GDEM) data. The raw GDEM products are of high-quality on the rugged terrain and coastal-regions of the Antarctic Peninsula and have good geospatial accuracy, but they also contain large errors on ice-covered terrain and we seek to minimise these artefacts. Conventional data correction techniques do not work so we have developed a method that significantly improves the dataset, smoothing the erroneous regions and hence creating a DEM with a pixel size of 100 m that will be suitable for many glaciological applications. We evaluate the new DEM using ICESat-derived elevations, and perform horizontal and vertical accuracy assessments based on GPS positions, SPOT-5 DEMs and the Landsat Image Mosaic of Antarctica (LIMA) imagery. The new DEM has a mean elevation difference of −4 m (± 25 m RMSE) from ICESat (compared to −13 m mean and ±97 m RMSE for the original ASTER GDEM), and a horizontal error of less than 2 pixels, although elevation accuracies are lower on mountain peaks and steep-sided slopes. The correction method significantly reduces errors on low relief slopes and therefore the DEM can be regarded as suitable for topographical studies such as measuring the geometry and ice flow properties of glaciers on the Antarctic Peninsula. The DEM is available for download from the NSIDC website: http://nsidc.org/data/nsidc-0516.html ( doi:10.5060/D47P8W9D ). |
format |
Article in Journal/Newspaper |
author |
A. J. Cook T. Murray A. Luckman D. G. Vaughan N. E. Barrand |
author_facet |
A. J. Cook T. Murray A. Luckman D. G. Vaughan N. E. Barrand |
author_sort |
A. J. Cook |
title |
A new 100-m Digital Elevation Model of the Antarctic Peninsula derived from ASTER Global DEM: methods and accuracy assessment |
title_short |
A new 100-m Digital Elevation Model of the Antarctic Peninsula derived from ASTER Global DEM: methods and accuracy assessment |
title_full |
A new 100-m Digital Elevation Model of the Antarctic Peninsula derived from ASTER Global DEM: methods and accuracy assessment |
title_fullStr |
A new 100-m Digital Elevation Model of the Antarctic Peninsula derived from ASTER Global DEM: methods and accuracy assessment |
title_full_unstemmed |
A new 100-m Digital Elevation Model of the Antarctic Peninsula derived from ASTER Global DEM: methods and accuracy assessment |
title_sort |
new 100-m digital elevation model of the antarctic peninsula derived from aster global dem: methods and accuracy assessment |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/essd-4-129-2012 https://doaj.org/article/21de67010dd6497bafcf5441cb21930c |
geographic |
Antarctic The Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_source |
Earth System Science Data, Vol 4, Iss 1, Pp 129-142 (2012) |
op_relation |
http://www.earth-syst-sci-data.net/4/129/2012/essd-4-129-2012.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 doi:10.5194/essd-4-129-2012 1866-3508 1866-3516 https://doaj.org/article/21de67010dd6497bafcf5441cb21930c |
op_doi |
https://doi.org/10.5194/essd-4-129-2012 |
container_title |
Earth System Science Data |
container_volume |
4 |
container_issue |
1 |
container_start_page |
129 |
op_container_end_page |
142 |
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1766274855708131328 |