AIS Vessel Trajectory Data from the Port of Antwerp, December 2023–January 2024
Description
This dataset contains pseudonymized dynamic Automatic Identification System (AIS) vessel trajectory data from the Port of Antwerp, collected via the AISStream.io API between 31 December 2023 and 24 January 2024. Collection was not continuous: no or fewer observations exist for 4, 6, 7, 8, or 11 January 2024. Following spatial restriction to the Port of Antwerp and removal of invalid identifiers, 5,462,834 messages from 2,553 vessels were retained. Trips were separated using a six-hour inter-message threshold, stopped observations were defined as speed over ground below 1 knot, and moving subtrajectories shorter than three points were discarded (see our published work for further details), yielding 956,995 observations from 2,377 vessels across 5,488 trips and 36,748 moving subtrajectories. Three files are provided. training_trajectories.csv (884,044 observations) is the trip-level 90% partition used for graph construction. test_trajectories_complete.csv (72,951 observations) contains the complete held-out moving subtrajectories used as ground truth. test_trajectories_sparse.csv (15,189 observations) is the same held-out data after synthetic gaps were introduced, generated within each subtrajectory using normally distributed temporal thresholds with mean 6 minutes and standard deviation 1.5 minutes. The train/test split was performed at trip level; 355 vessels contribute trips to both partitions. Each observation provides position, speed over ground, course over ground, reported true heading, and navigational status. These data support research on vessel trajectory reconstruction, maritime traffic modelling, and movement pattern analysis in constrained port environments, and were used for our work titled "Data-Driven Graph-Based Methods for In-Port AIS Vessel Trajectory Reconstruction." The data are pseudonymized rather than anonymous: original MMSIs, vessel names, and source identifiers have been removed and replaced with stable pseudonymous identifiers, but exact timestamps and positions describe public vessel movements and may permit linkage to external AIS sources. Users must not attempt to re-identify vessels or individuals.
Files
Institutions
- CMMI – Cyprus Marine & Maritime Institute (Cyprus)Larnaka, Larnaca