The pathlets

Now that we have selected nodes on the original trajectory, we can find the associated pathlets. Each pathlet is the sequence of points between two consecutive nodes on the trajectory. Figure 5.8 illustrates how to find the pathlets.

Figure 5.8: Selection of the pathlets given the nodes. The points of the original trajectory are represented by circles and the nodes are represented by filled circles. The first pathlet is the sequence of points from the original trajectory from node 1 to node 2, the second is the sequence from node 2 to node 3, and so on.

The next step in the framework is to cluster the pathlets into meaningful groups which can be modelled. The next section describes how we model the pathlet groups.