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Quantification of spatial and thematic uncertainty in the application of underwater video for benthic habitat mapping

journal contribution
posted on 2023-05-18, 08:57 authored by Rattray, A, Ierodiaconou, D, Jacquomo MonkJacquomo Monk, Laurenson, LJB, Kennedy, P
This study presents an analysis of the application of underwater video data collected for training and validating benthic habitat distribution models. Specifically, we quantify the two major sources of error pertaining to collection of this type of reference data. A theoretical spatial error budget is developed for a positioning system used to co-register video frames to their corresponding locations at the seafloor. Second, we compare interpretation variability among trained operators assessing the same video frames between times over three hierarchical levels of a benthic classification scheme. Propagated error in the positioning system described was found to be highly correlated with depth of operation and varies from 1.5m near the surface to 5.7m in 100m of water. In order of decreasing classification hierarchy, mean overall observer agreement was found to be 98% (range 6%), 82% (range 12%) and 75% (range 17%) for the 2, 4, and 6 class levels of the scheme, respectively. Patterns in between-observer variation are related to the level of detail imposed by each hierarchical level of the classification scheme, the feature of interest, and to the amount of observer experience.

History

Publication title

Marine Geodesy

Volume

37

Pagination

315-336

ISSN

0149-0419

Department/School

Institute for Marine and Antarctic Studies

Publisher

Taylor & Francis Inc.

Place of publication

United States

Rights statement

Copyright 2014 Taylor & Francis Group, LLC

Repository Status

  • Restricted

Socio-economic Objectives

Marine biodiversity

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