The dataset has been collected by IMIS Hellas S.A. which is a technology oriented company focusing on AIS technology and Public Information Systems. URL: http://www.imishellas.gr/ The dataset has been donated to Infolab (URL: http://infolab.cs.unipi.gr/) for research purposes.
Average Number of Spatio-Temporal Points per Trajectory: 577
Minimum Timestamp -> 2009-07-01 00:00:00
Maximum Timestamp -> 2009-07-31 23:59:59
Lowest Latitude -> 34.6A
Lowest Longitude -> 19A
Highest Latitude -> 42A
Highest Longitude -> 30A
The format of each record is: "t, lon, lat, obj_id, flag, subtraj_id, subtraj_type, traj_id, port_id, port_title". More info about the columns and the data enrichment methodology followed are found at IMIS-1month.pdf file.