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AIS Vessel Transit Counts 2021

Metadata Updated: April 15, 2024

Automatic Identification Systems (AIS) are a navigation safety device that transmits and monitors the location and characteristics of many vessels in U.S. and international waters in real-time. In the U.S. the Coast Guard and industry collect AIS data, which can also be used for a variety of coastal planning purposes. NOAA and BOEM have worked jointly to re-task and make available some of the most important records from the U.S. Coast Guard's national network of AIS receivers. This dataset represents annual vessel transit counts summarized at a 100 m by 100 m geographic area. A single transit is counted each time a vessel track passes through, starts, or stops within a 100 m grid cell.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Date February 29, 2024
Metadata Created Date July 7, 2022
Metadata Updated Date April 15, 2024
Reference Date(s) June 24, 2022 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from NOS OCM

Additional Metadata

Resource Type Dataset
Metadata Date February 29, 2024
Metadata Created Date July 7, 2022
Metadata Updated Date April 15, 2024
Reference Date(s) June 24, 2022 (publication)
Responsible Party NOAA Office for Coastal Management (Point of Contact)
Contact Email
Guid gov.noaa.nmfs.inport:67463
Access Constraints Cite As: Office for Coastal Management, [Date of Access]: AIS Vessel Transit Counts 2021 [Data Date Range],, Use Constraints: For coastal and ocean planning, Distribution Liability:
Bbox East Long -60
Bbox North Lat 50
Bbox South Lat 15
Bbox West Long -168
Coupled Resource
Frequency Of Update notPlanned
Harvest Object Id 36d387ea-2fe7-4b3e-8e4c-05cd51cfc955
Harvest Source Id c0121fd9-df15-4168-ac04-42f6e36a794d
Harvest Source Title NOS OCM
Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-168.0, 15.0], [-60.0, 15.0], [-60.0, 50.0], [-168.0, 50.0], [-168.0, 15.0]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System EPSG::4269
Spatial Harvester True
Temporal Extent Begin 2021-01-01
Temporal Extent End 2021-12-31

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