Movement data in GIS part 3: visualizing massive trajectory datasets | Free and Open Source GIS Ramblings
►https://anitagraser.com/2016/11/07/movement-data-in-gis-3-visualizing-massive-trajectory-datasets
While visualizing individual trajectories is important, the real challenge is trying to visualize massive trajectory datasets in a way that enables further analysis.
1) Extracting characteristic points from the trajectories
2) Grouping the extracted points by spatial proximity
3) Computing group centroids and corresponding Voronoi cells
4) Deviding trajectories into segments according to the Voronoi cells
Counting transitions from one cell to another
