Improving data retention and home range estimates by data-driven screening

Shimada, Takahiro, Jones, Rhondda, Limpus, Colin, and Hamann, Mark (2012) Improving data retention and home range estimates by data-driven screening. Marine Ecology Progress Series, 457. pp. 171-180.

PDF (Published Version) - Published Version
Download (498kB)
View at Publisher Website:


Fast acquisition GPS technologies such as Fastloc GPS have been commonly used in recent years to study fine scale spatio-temporal ecology of marine vertebrates. While Fastloc GPS gives more accurate locations than earlier methods, it remains important to identify and remove locations with high error because some location fixes are much less accurate than others. Increasing the number of source satellites required for a valid fix is a simple filter method but it comes at the cost of great data loss. Using data sets acquired from loggerhead turtles Caretta caretta, we explored an alternative filtering approach, based on speed between successive locations, angles created by 3 consecutive locations, manufacturer's quality index, and number of satellites used for location calculation. The performance of the proposed filter method was evaluated by conducting terrestrial, mobile tests. When our filter method was used, the linear error (mean ± SD) of Fastloc GPS data decreased from 2645.5 ± 29458.2 m (n = 1328) to 47.1 ± 61.0 m (n = 1246), while retaining more than 94% of data. Our filter method also led to more accurate home range estimates than the simple filter method. Improvements in data retention and home range estimates will give more reliable information for marine spatial planning and habitat protection.

Item ID: 25482
Item Type: Article (Research - C1)
ISSN: 1616-1599
Keywords: Fastloc GPS, screening, accuracy, data retention, home range estimation, Caretta caretta
Additional Information:

Article openly accessible from publisher website.

Funders: Queensland Department of Environment and Resource Management (DERM), James Cook University
Projects and Grants: Queensland Turtle Conservation Project (QTCP)
Date Deposited: 13 Mar 2013 05:29
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050202 Conservation and Biodiversity @ 100%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960802 Coastal and Estuarine Flora, Fauna and Biodiversity @ 100%
Downloads: Total: 1061
Last 12 Months: 48
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page