Sub-Antarctic Auckland Islands Seafloor Mapping Investigations Using Legacy Data

This paper demonstrates the richness of data collected for nautical charting and considers ways in which chart data can support scientific research, through a case study of two modern navigation surveys undertaken in the Auckland Islands. While legacy charts have coarser resolution, and may synthesi...

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Bibliographic Details
Published in:Geosciences
Main Authors: Emily J. Tidey, Christina L. Hulbe
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2019
Subjects:
nautical chart
hydrographic survey
legacy
seabed sample
sub-Antarctic
singlebeam
multibeam
Geology
QE1-996.5
Antarctic
Antarc*
Auckland Islands
Online Access:https://doi.org/10.3390/geosciences9020056
https://doaj.org/article/8f32f091f08049c2bca7d34180117624
Description
Summary:This paper demonstrates the richness of data collected for nautical charting and considers ways in which chart data can support scientific research, through a case study of two modern navigation surveys undertaken in the Auckland Islands. While legacy charts have coarser resolution, and may synthesize different epochs together into one final product, we examine how they may be used on their own and to complement more recent hydrographic surveys. We argue that the hydrographic and ancillary data, only a fraction of which appears on the final chart, also has scientific value and that the hydrographic surveying principles applied during data collection are equally relevant for all seabed mapping. While the benefits of full bottom coverage obtained by state of-the-art multibeam surveys are clear, there is much more to be discovered in legacy singlebeam datasets than what is displayed on the nautical chart alone.

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