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Variation and uncertainty in bathymetric slope calculations using geographic information systems

journal contribution
posted on 2023-05-18, 01:17 authored by Dolan, MFJ, Vanessa LucieerVanessa Lucieer
Bathymetry data from multibeam echosounders and other acoustic sources are now widely available in the form of digital terrain models, which are conveniently displayed as raster grids in desktop geographic information systems. Calculation of terrain variables such as slope is a simple push-button operation in most geographic information systems; however, as we demonstrate here, there can be a great variation in the slope values obtained due to computation algorithms and resolution or analysis scale. This article also demonstrates how Monte Carlo simulation can be used to visualise uncertainty in the underlying bathymetry dataset and also how this uncertainty impacts on slope calculations.

History

Publication title

Marine Geodesy

Volume

37

Pagination

187-219

ISSN

0149-0419

Department/School

Institute for Marine and Antarctic Studies

Publisher

Taylor & Francis Group

Place of publication

Norway

Rights statement

Copyright 2014 Taylor and Francis

Repository Status

  • Restricted

Socio-economic Objectives

Assessment and management of terrestrial ecosystems

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