Learn R Programming
ctmm (version 0.3.1)

as.telemetry: Import, coerce, and summarize MoveBank data

Description

Functions to import MoveBank csv files, data.frame, and Move objects, coerce them into telemetry objects, and summarize them.

Usage

as.telemetry(CSV,timezone="GMT",projection=NULL,UERE=NULL,...)

## S3 method for class 'character':
as.telemetry(CSV,timezone="GMT",projection=NULL,UERE=NULL,...)

## S3 method for class 'data.frame':
as.telemetry(CSV,timezone="GMT",projection=NULL,UERE=NULL,...)

## S3 method for class 'Move':
as.telemetry(CSV,timezone="GMT",projection=NULL,UERE=NULL,...)

## S3 method for class 'telemetry':
summary(object,...)

Arguments

CSV
The file name of the MoveBank csv file, data.frame object from a MoveBank data CSV, or Move object.
timezone
Timezone argument for as.POSIXct.
projection
Optional PROJ.4 projection argument to be fed to project.
UERE
"User equivalent range errors" needed to translate DOP values into location uncertainty.
...
Optional arguments to be fed to read.csv.
object
telemetry object to summarize.

Value

  • as.telemetry returns a single telemetry object or list of telemetry objects if multiple animals are identified.

encoding

UTF-8

Details

If no projection argument is specified, a two-point equidistant projection is calculated that should be good for most range resident and migratory species. Global migrations that are not relatively geodesic (locally straight) will probably suffer distortion. The necessary MoveBank columns are individual.local.identifier, timestamp, location.long and location.lat, while the optional Movebank columns are eobs.horizontal.accuracy.estimate and GPS.HDOP. In the future, we will be supporting more GPS and ARGOS columns, including speed, heading, error classification, etc. The GPS.HDOP value requires the device's UERE value to be translated into telemetry errors. The UERE represents the RMS error given ideal satellite conditions. Therefore, if your device is purported to have an accuracy of 2-10 meters, then the UERE is likely around 2 meters. Consult your device manual and manufacturer for a specific value. In the future we will support UERE calibration.

See Also

plot.telemetry, SpatialPoints.telemetry.