Spatial-temporal co-occurrence in the maritime domain
Sollish, Andrew B.
Everton, Sean F.
Rowe, Neil C.
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To prevent and stop illegal and malicious maritime activity, it is necessary to better understand the people, places, organizations, and vessels that contribute to those activities. This thesis examines whether spatial-temporal co-occurrence is useful for finding connections among vessels and providing understanding of their activities. A spatial-temporal co-occurrence means that two or more entities can be found nearby at the same time. To identify those occasions, we used two datasets, Automatic Identification System (AIS) records of vessel positions and time and company information on the ownership of vessels (used to confirm if vessels were affiliated). Three experiments studied co-occurrence among groups of vessels including randomly selected vessels, vessels of interest, and locations of interest. Vessels were identified for each of the three experiments and their co-occurrences were identified. We found that co-occurrence manifested in different ways and it was not especially useful in demonstrating affiliation among vessels.
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