Geosciences (Jan 2019)

Sub-Antarctic Auckland Islands Seafloor Mapping Investigations Using Legacy Data

  • Emily J. Tidey,
  • Christina L. Hulbe

DOI
https://doi.org/10.3390/geosciences9020056
Journal volume & issue
Vol. 9, no. 2
p. 56

Abstract

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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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