Function to filter temporally and spatially exact locations in tracking data.
A data frame containing columns with the following headers: "id", "DateTime", "lat", "lon", "qi".
See the data
This is a partial component of
dupfilter, although works as a stand-alone function.
It looks for temporally and spatially exact locations and retains only a single fix (latitude/longitude pair) per time and location.
The input data frame is returned with temporally and spatially exact duplicates removed.
Shimada T, Limpus C, Jones R, Hazel J, Groom R, Hamann M (2016) Sea turtles return home after intentional displacement from coastal foraging areas. Marine Biology 163:1-14 doi: 10.1007/s00227-015-2771-0
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