Error Estimation of Bathymetric Grid Models Derived from Historic and Contemporary Data Sets

The past century has seen remarkable advances in technologies associated with positioning and the measurement of depth. Lead lines have given way to single beam echo sounders, which in turn are being replaced by multibeam sonars and other means of remotely and rapidly collecting dense bathymetric da...

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Main Authors: Jakobsson, Martin, Calder, Brian R., Mayer, Larry A., Armstrong, Andy
Format: Text
Language:unknown
Published: University of New Hampshire Scholars' Repository 2001
Subjects:
Online Access:https://scholars.unh.edu/ccom/223
https://scholars.unh.edu/cgi/viewcontent.cgi?article=1222&context=ccom
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spelling ftuninhampshire:oai:scholars.unh.edu:ccom-1222 2023-05-15T15:14:51+02:00 Error Estimation of Bathymetric Grid Models Derived from Historic and Contemporary Data Sets Jakobsson, Martin Calder, Brian R. Mayer, Larry A. Armstrong, Andy 2001-05-01T07:00:00Z application/pdf https://scholars.unh.edu/ccom/223 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1222&context=ccom unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/ccom/223 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1222&context=ccom Center for Coastal and Ocean Mapping Oceanography and Atmospheric Sciences and Meteorology text 2001 ftuninhampshire 2023-01-30T21:32:25Z The past century has seen remarkable advances in technologies associated with positioning and the measurement of depth. Lead lines have given way to single beam echo sounders, which in turn are being replaced by multibeam sonars and other means of remotely and rapidly collecting dense bathymetric datasets. Sextants were replaced by radio navigation, then transit satellite, GPS and now differential GPS. With each new advance comes tremendous improvement in the accuracy and resolution of the data we collect. Given these changes and given the vastness of the ocean areas we must map, the charts we produce are mainly compilations of multiple data sets collected over many years and representing a range of technologies. Yet despite our knowledge that the accuracy of the various technologies differs, our compilations have traditionally treated each sounding with equal weight. We address these issues in the context of generating regularly spaced grids containing bathymetric values. Gridded products are required for a number of earth sciences studies and for generating the grid we are often forced to use a complex interpolation scheme due to the sparseness and irregularity of the input data points. Consequently, we are faced with the difficult task of assessing the confidence that we can assign to the final grid product, a task that is not usually addressed in most bathymetric compilations. Traditionally the hydrographic community has considered each sounding equally accurate and there has been no error evaluation of the bathymetric end product. This has important implications for use of the gridded bathymetry, especially when it is used for generating further scientific interpretations. In this paper we approach the problem of assessing the confidence of the final bathymetry gridded product via a direct-simulation Monte Carlo method. We start with a small subset of data from the International Bathymetric Chart of the Arctic Ocean (IBCAO) grid model [Jakobsson et al., 2000]. This grid is compiled from a mixture of data ... Text Arctic Arctic Ocean University of New Hampshire: Scholars Repository Arctic Arctic Ocean
institution Open Polar
collection University of New Hampshire: Scholars Repository
op_collection_id ftuninhampshire
language unknown
topic Oceanography and Atmospheric Sciences and Meteorology
spellingShingle Oceanography and Atmospheric Sciences and Meteorology
Jakobsson, Martin
Calder, Brian R.
Mayer, Larry A.
Armstrong, Andy
Error Estimation of Bathymetric Grid Models Derived from Historic and Contemporary Data Sets
topic_facet Oceanography and Atmospheric Sciences and Meteorology
description The past century has seen remarkable advances in technologies associated with positioning and the measurement of depth. Lead lines have given way to single beam echo sounders, which in turn are being replaced by multibeam sonars and other means of remotely and rapidly collecting dense bathymetric datasets. Sextants were replaced by radio navigation, then transit satellite, GPS and now differential GPS. With each new advance comes tremendous improvement in the accuracy and resolution of the data we collect. Given these changes and given the vastness of the ocean areas we must map, the charts we produce are mainly compilations of multiple data sets collected over many years and representing a range of technologies. Yet despite our knowledge that the accuracy of the various technologies differs, our compilations have traditionally treated each sounding with equal weight. We address these issues in the context of generating regularly spaced grids containing bathymetric values. Gridded products are required for a number of earth sciences studies and for generating the grid we are often forced to use a complex interpolation scheme due to the sparseness and irregularity of the input data points. Consequently, we are faced with the difficult task of assessing the confidence that we can assign to the final grid product, a task that is not usually addressed in most bathymetric compilations. Traditionally the hydrographic community has considered each sounding equally accurate and there has been no error evaluation of the bathymetric end product. This has important implications for use of the gridded bathymetry, especially when it is used for generating further scientific interpretations. In this paper we approach the problem of assessing the confidence of the final bathymetry gridded product via a direct-simulation Monte Carlo method. We start with a small subset of data from the International Bathymetric Chart of the Arctic Ocean (IBCAO) grid model [Jakobsson et al., 2000]. This grid is compiled from a mixture of data ...
format Text
author Jakobsson, Martin
Calder, Brian R.
Mayer, Larry A.
Armstrong, Andy
author_facet Jakobsson, Martin
Calder, Brian R.
Mayer, Larry A.
Armstrong, Andy
author_sort Jakobsson, Martin
title Error Estimation of Bathymetric Grid Models Derived from Historic and Contemporary Data Sets
title_short Error Estimation of Bathymetric Grid Models Derived from Historic and Contemporary Data Sets
title_full Error Estimation of Bathymetric Grid Models Derived from Historic and Contemporary Data Sets
title_fullStr Error Estimation of Bathymetric Grid Models Derived from Historic and Contemporary Data Sets
title_full_unstemmed Error Estimation of Bathymetric Grid Models Derived from Historic and Contemporary Data Sets
title_sort error estimation of bathymetric grid models derived from historic and contemporary data sets
publisher University of New Hampshire Scholars' Repository
publishDate 2001
url https://scholars.unh.edu/ccom/223
https://scholars.unh.edu/cgi/viewcontent.cgi?article=1222&context=ccom
geographic Arctic
Arctic Ocean
geographic_facet Arctic
Arctic Ocean
genre Arctic
Arctic Ocean
genre_facet Arctic
Arctic Ocean
op_source Center for Coastal and Ocean Mapping
op_relation https://scholars.unh.edu/ccom/223
https://scholars.unh.edu/cgi/viewcontent.cgi?article=1222&context=ccom
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