“…For small-scale movement data, the STP-based representation can be used directly in movement data visualization, from which we can obtain meaningful information [10], [11]. As mentioned above, with increasingly large movement datasets becoming available, this type of display can easily become cluttered and illegible, making it impossible to identify useful information from the map [12]. Therefore, certain forms of trajectory data generalization/aggregation are necessary for reliable pattern recognition [1], [13], [14].…”