Shifting Granularity Over Geospatial Lifelines (Extended Abstract)
Kathleen Hornsby · 2000
It is often desirable to consider an object’s movement over space and time from the perspective of different levels of de-tail or granularity. Changing to a more detailed view uncov-ers information that otherwise is unknown. Conversely, mov-ing to a simpler view can improve our understanding of the movement patterns of an object. This paper considers shifts in granularity over geospatial lifelines. A geospatial lifeline is a time-stamped record of all the locations that an object has occupied over a period of time. An approach to modeling lifelines at different granularities is presented, identifying dif-ferent aspects of lifelines that are relevant at refined or coarse granularities.