Comparison and evaluation of global publicly available bathymetry grids in the Arctic
In this study we evaluate the differences between six publicly available bathymetry grids in different regions of the Arctic. The independent, high-resolution and accuracy multibeam sonar derived grids are used as a ground truth against which the analyzed grids are compared. The specific bathymetry...
Main Author: | |
---|---|
Format: | Text |
Language: | unknown |
Published: |
University of New Hampshire Scholars' Repository
2012
|
Subjects: | |
Online Access: | https://scholars.unh.edu/thesis/699 https://scholars.unh.edu/context/thesis/article/1698/viewcontent/1518001.pdf |
id |
ftuninhampshire:oai:scholars.unh.edu:thesis-1698 |
---|---|
record_format |
openpolar |
spelling |
ftuninhampshire:oai:scholars.unh.edu:thesis-1698 2023-06-11T04:09:13+02:00 Comparison and evaluation of global publicly available bathymetry grids in the Arctic Abramova, Anastasia S 2012-01-01T08:00:00Z application/pdf https://scholars.unh.edu/thesis/699 https://scholars.unh.edu/context/thesis/article/1698/viewcontent/1518001.pdf unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/thesis/699 https://scholars.unh.edu/context/thesis/article/1698/viewcontent/1518001.pdf Master's Theses and Capstones Marine Geology Geomorphology Geodesy text 2012 ftuninhampshire 2023-05-04T17:35:55Z In this study we evaluate the differences between six publicly available bathymetry grids in different regions of the Arctic. The independent, high-resolution and accuracy multibeam sonar derived grids are used as a ground truth against which the analyzed grids are compared. The specific bathymetry grids assessed, IBCAO, GEBCO 1 minute, GEBCO_08, ETOPO1, SRTM30_Plus, and Smith and Sandwell, are separated into two major Types: Type A, grids based solely on sounding data sources, and Type B, grids based on sounding data combined with gravity data. The differences were evaluated in terms of source data accuracy, depth accuracy, internal consistency, presence of artifacts, interpolation accuracy, registration issues and resolution of the coastline. These parameters were chosen as quality metrics important for the choice of the grid for any given purpose. We find that Type A bathymetry grids (in particular GEBCO_08) perform better than Type B grids in terms of internal consistency, and have higher accuracy in the different morphological provinces, especially the continental shelf, mainly due to the better source data coverage. Type B grids, on the other hand, have pronounced artifacts and have low accuracy on the shelf due to the scarcity of source data in the region and, in general, the poor performance of gravity prediction in shallow areas and high latitudes. Finally, we propose qualitative metrics that are important when choosing a bathymetry grid and support these metrics with a quality model to guide the choice of the most appropriate grid. Text Arctic University of New Hampshire: Scholars Repository Arctic |
institution |
Open Polar |
collection |
University of New Hampshire: Scholars Repository |
op_collection_id |
ftuninhampshire |
language |
unknown |
topic |
Marine Geology Geomorphology Geodesy |
spellingShingle |
Marine Geology Geomorphology Geodesy Abramova, Anastasia S Comparison and evaluation of global publicly available bathymetry grids in the Arctic |
topic_facet |
Marine Geology Geomorphology Geodesy |
description |
In this study we evaluate the differences between six publicly available bathymetry grids in different regions of the Arctic. The independent, high-resolution and accuracy multibeam sonar derived grids are used as a ground truth against which the analyzed grids are compared. The specific bathymetry grids assessed, IBCAO, GEBCO 1 minute, GEBCO_08, ETOPO1, SRTM30_Plus, and Smith and Sandwell, are separated into two major Types: Type A, grids based solely on sounding data sources, and Type B, grids based on sounding data combined with gravity data. The differences were evaluated in terms of source data accuracy, depth accuracy, internal consistency, presence of artifacts, interpolation accuracy, registration issues and resolution of the coastline. These parameters were chosen as quality metrics important for the choice of the grid for any given purpose. We find that Type A bathymetry grids (in particular GEBCO_08) perform better than Type B grids in terms of internal consistency, and have higher accuracy in the different morphological provinces, especially the continental shelf, mainly due to the better source data coverage. Type B grids, on the other hand, have pronounced artifacts and have low accuracy on the shelf due to the scarcity of source data in the region and, in general, the poor performance of gravity prediction in shallow areas and high latitudes. Finally, we propose qualitative metrics that are important when choosing a bathymetry grid and support these metrics with a quality model to guide the choice of the most appropriate grid. |
format |
Text |
author |
Abramova, Anastasia S |
author_facet |
Abramova, Anastasia S |
author_sort |
Abramova, Anastasia S |
title |
Comparison and evaluation of global publicly available bathymetry grids in the Arctic |
title_short |
Comparison and evaluation of global publicly available bathymetry grids in the Arctic |
title_full |
Comparison and evaluation of global publicly available bathymetry grids in the Arctic |
title_fullStr |
Comparison and evaluation of global publicly available bathymetry grids in the Arctic |
title_full_unstemmed |
Comparison and evaluation of global publicly available bathymetry grids in the Arctic |
title_sort |
comparison and evaluation of global publicly available bathymetry grids in the arctic |
publisher |
University of New Hampshire Scholars' Repository |
publishDate |
2012 |
url |
https://scholars.unh.edu/thesis/699 https://scholars.unh.edu/context/thesis/article/1698/viewcontent/1518001.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Master's Theses and Capstones |
op_relation |
https://scholars.unh.edu/thesis/699 https://scholars.unh.edu/context/thesis/article/1698/viewcontent/1518001.pdf |
_version_ |
1768382984172339200 |