Creates a list containing the trajectories information.
tr_gen(data, projection = CRS("+proj=longlat"), origin = "1970-01-01 UTC")
Every component of the list has the following subcomponents: #'
An object of class Track.
An object of class SpatialPoints.
Subject identifier
Trip identifier.
Projection string of class CRS-class.
Optional. Origin of the date-time. Only needed in the internal process to create an object of type POSIXct.