Fig. 1
From: Graph mining for the detection of overcrowding and waste of resources in public transport
Visualization of information contained in the analyzed data sets. a number of validations of the Single Ticket during a weekday. The blue line shows the number of Single Ticket validations per hour on a weekday, and the vertical red dashed lines show three hour periods. b Density map of bus GPS points in the city of Fortaleza. The number of GPS points in the 3043 census tracts of the city was calculated, the colors were attributed from the logarithmic scale of the GPS point density