filter_track_data       'dplyr' functions to manipulate the track data
movebank_download_study
                        Download data from movebank
movebank_get_vocabulary
                        Retrieve information from the movebank
                        vocabulary describing the columns
movebank_handle         Create a curl handle for accessing movebank
movebank_store_credentials
                        Store or remove credentials in the system
                        keyring
mt_aeqd_crs             Create a AEQD coordinate reference system
mt_as_move2             Create a new move2 object
mt_as_track_attribute   Move one or more columns to track attributes or
                        event attributes
mt_azimuth              Calculate azimuths or turn angles
mt_distance             Return distances or speeds between locations
mt_example              Get path to 'move2' example data
mt_filter_movebank_visible
                        Identify records that are not outliers
                        according to the logic used in movebank
mt_filter_per_interval
                        Find subset of records based on time windows
mt_filter_unique        Filter out duplicated records from a 'move2'
                        object
mt_interpolate          Linearly interpolate locations
mt_is_track_id_cleaved
                        Functions for asserting properties of a 'move2'
                        object
mt_read                 Reading files downloaded from movebank
mt_segments             Create a 'LINESTRING' for each track segment
mt_sim_brownian_motion
                        Simulate Brownian motion
mt_stack                Combine multiple 'move2' objects into one
mt_time                 Retrieve/replace timestamps or get the interval
                        duration between locations
mt_time_column          Get or set the name of the column containing
                        the 'track_id' and 'time'
mt_track_data           Setting and retrieving the track data in
                        'move2' objects
mt_track_id             Retrieve the column with track ids or get the
                        number of tracks
mt_track_lines          Convert trajectories into lines
to_move                 Convert a move2 object to a move object
