moveMerger

Handles move/track events that do not meet specific thresholds to be
considered. This is based on the researcher-decided total number of
allowable locations that the discarded track can consist of, as well as a
maximum total time length that may elapse. Tracks can be merged into the
preceding stop or excluded. Future versions of this should consider assigning
to the closest stop for <code>small_track_action = merge</code>.

Trajectory data formed by human or animal movement is often marked
by periods of movement interspersed with periods of standing still. It is
often of interest to researchers to separate geolocation trajectories of
latitude/longitude points by clustering consecutive locations to produce a
model of this behavior. This package implements the Stay Point detection
algorithm originally described in Ye (2009) <doi:10.1109/MDM.2009.11> that
uses time and distance thresholds to characterize spatial regions as
'stops'. This package also implements the concept of merging described in
Montoliu (2013) <doi:10.1007/s11042-011-0982-z> as stay point region
estimation, which allows for clustering of temporally adjacent stops for
which distance between the midpoints is less than the provided threshold.
GPS-like data from various sources can be used, but the temporal thresholds
must be considered with respect to the sampling interval, and the spatial
thresholds must be considered with respect to the measurement error.

Danielle McCool

stopdetection

Stop Detection in Timestamped Trajectory Data using
Spatiotemporal Clustering

McCool Danielle

moveMerger function

<dl><dt>events</dt>
<dd>data.table of events from <code>returnStateEvents</code></dd>
<dt>small_track_action</dt>
<dd>One of "merge" or "exclude" for specifying the
method of handling mergeable tracks</dd>
<dt>max_locs</dt>
<dd>Maximum number of locations for a track to be mergeable. Set
to Inf to not consider.</dd>
<dt>max_time</dt>
<dd>Maximum time elapsed (seconds) for a track to be mergeable.
Set to Inf to not consider.</dd>
<dt>max_dist</dt>
<dd>Maximum distance (meters) traveled while on track to be
mergeable. Set to Inf to not consider.</dd></dl>

Arguments

Move Merger — moveMerger

<dl>

<dt>events</dt>
<dd>data.table of events from <code>returnStateEvents</code></dd>


<dt>small_track_action</dt>
<dd>One of "merge" or "exclude" for specifying the
method of handling mergeable tracks</dd>


<dt>max_locs</dt>
<dd>Maximum number of locations for a track to be mergeable. Set
to Inf to not consider.</dd>


<dt>max_time</dt>
<dd>Maximum time elapsed (seconds) for a track to be mergeable.
Set to Inf to not consider.</dd>


<dt>max_dist</dt>
<dd>Maximum distance (meters) traveled while on track to be
mergeable. Set to Inf to not consider.</dd>

</dl>

moveMerger: Move Merger

Description

Usage

Value

Arguments