Description

The Automatic Identification System (AIS) is a global, satellite-based and terrestrial-based ship tracking system that uses shipborne equipment to remotely track vessel identification and positional information and is typically required on vessels of 300 gross tonnage or more on an international voyage, of 500 gross tonnage or more not on an international voyage, and passenger ships of all sizes. AIS tracking technologies are primarily used in support of real-time maritime domain awareness and for maritime security and safety of life at sea. This report describes a geographic information system (GIS) analysis of 2019 AIS data to produce yearly and monthly vessel density maps of all vessel classes combined and yearly density maps of each vessel class. The year 2019 was selected to portray shipping densities in a pre-COVID 19 pandemic depiction of the maritime transport sector in the Northwest Atlantic. Vessel density map applications include use in spatial analysis and decision support for marine spatial planning. In 2025 the process was applied to the years 2013 through to 2022 and were made available using the same processes that were applied to the original 2019 datasets.

Resources

Name	Format	Description	Link
AIS Vessel density legend	PNG		https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/e60a7e32-5a67-45d6-900d-e6ab6b581a51/attachments/Legend.png
Release criteria checklist pdf	Unknown		https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/e60a7e32-5a67-45d6-900d-e6ab6b581a51/attachments/release_criteria_checklist_open_government.pdf
Data Dictionary	TXT		https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/eac8e835-e7c8-450d-96b0-ff42d416c815/attachments/DataDictionary2025.txt
Mapping vessel density from 2025 Automatic Identification System (AIS) data in the Northwest Atlantic	Unknown		https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/eac8e835-e7c8-450d-96b0-ff42d416c815/attachments/NorthwestAtlantic_VesselDensity_2025_AIS.gdb.zip
Mapping vessel density from 2025 Automatic Identification System (AIS) data in the Northwest Atlantic	Unknown		https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/eac8e835-e7c8-450d-96b0-ff42d416c815/attachments/TIF_for_Download_Albers_2025.zip
Northwest Atlantic, Vessel Density, 2025, AIS	Ersi REST		https://egisp.dfo-mpo.gc.ca/arcgis/rest/services/open_data_donnees_ouvertes/nw_atlantic_vessel_density_2025_ais_densite_des_navires_nw_atlantique_2025_sia/MapServer
Northwest Atlantic, Vessel Density, 2025, AIS	Ersi REST		https://egisp.dfo-mpo.gc.ca/arcgis/rest/services/open_data_donnees_ouvertes/nw_atlantic_vessel_density_2025_ais_densite_des_navires_nw_atlantique_2025_sia/MapServer

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