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• W2171294441 abstract "Consumer-grade GPS units are a staple of modern field ecology, but the relatively large error radii reported by manufacturers (up to 10 m) ostensibly precludes their utility in measuring fine-scale movement of small animals such as insects. Here we demonstrate that for data collected at fine spatio-temporal scales, these devices can produce exceptionally accurate data on step-length and movement patterns of small animals. With an understanding of the properties of GPS error and how it arises, it is possible, using a simple field protocol, to use consumer grade GPS units to collect step-length data for the movement of small animals that introduces a median error as small as 11 cm. These small error rates were measured in controlled observations of real butterfly movement. Similar conclusions were reached using a ground-truth test track prepared with a field tape and compass and subsequently measured 20 times using the same methodology as the butterfly tracking. Median error in the ground-truth track was slightly higher than the field data, mostly between 20 and 30 cm, but even for the smallest ground-truth step (70 cm), this is still a signal-to-noise ratio of 3:1, and for steps of 3 m or more, the ratio is greater than 10:1. Such small errors relative to the movements being measured make these inexpensive units useful for measuring insect and other small animal movements on small to intermediate scales with budgets orders of magnitude lower than survey-grade units used in past studies. As an additional advantage, these units are simpler to operate, and insect or other small animal trackways can be collected more quickly than either survey-grade units or more traditional ruler/gird approaches." @default.
• W2171294441 created "2016-06-24" @default.
• W2171294441 creator A5028872154 @default.
• W2171294441 creator A5060045550 @default.
• W2171294441 date "2015-08-20" @default.
• W2171294441 modified "2023-09-27" @default.
• W2171294441 title "Low relative error in consumer-grade GPS units make them ideal for measuring small-scale animal movement patterns" @default.
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• W2171294441 doi "https://doi.org/10.7717/peerj.1205" @default.
• W2171294441 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4548486" @default.
• W2171294441 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26312190" @default.
• W2171294441 hasPublicationYear "2015" @default.
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