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

Citation

Rattray, A and Ierodiaconou, D and Monk, J and Laurenson, LJB and Kennedy, P, Quantification of spatial and thematic uncertainty in the application of underwater video for benthic habitat mapping, Marine Geodesy, 37, (3) pp. 315-336. ISSN 0149-0419 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 Taylor & Francis Group, LLC

DOI: doi:10.1080/01490419.2013.877105

Abstract

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.

Item Details

Item Type:Refereed Article
Keywords:spatial and thematic error, GPS location, towed video
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquatic Ecosystem Studies and Stock Assessment
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Marine Flora, Fauna and Biodiversity
Author:Monk, J (Dr Jacquomo Monk)
ID Code:99554
Year Published:2014
Web of Science® Times Cited:9
Deposited By:IMAS Research and Education Centre
Deposited On:2015-03-27
Last Modified:2017-11-04
Downloads:0

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