1. Assessment of the accuracy of GeoNames gazetteer data;Ahlers,2013
2. Towards semantic trajectory knowledge discovery;Alvares,2007
3. OPTICS: ordering points to identify the clustering structure;Ankerst,1999
4. Towards activity recognition in moving object trajectories from twitter data;Aurelio Beber,2016
5. DBSCAN: A density-based spatial clustering of application with noise;Bäcklund,2011