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Ship Traffic 2011 West Coast Region - All Ship Types

Metadata Updated: October 29, 2023

The data was derived from US Coast Guard raw vessel point returns and preprocessed by ASA (Applied Science Associates), to one minute point interCAls. The data returns are in UTM zone 10 North and UTM zone 11 North. Each vessel type is analyzed seperately based on vessel type data (Cargo, Fishing, Passenger, Tanker, Tow, Tow over 200M, Tugs) included in the AIS dataset. A transit is counted for each unique vessel by MMSI traveling through each 1200 meter by 1200 meter aliquot each day. A running count is continued for each vessel type by aliquot by month, and then the months are summed to provide annual data. Although traffic diminishes significantly after 20nm from shore, the returns from line of site AIS signals also fade beyond 40nm. Data points input into the density analysis beyond 40nm are considered to be less reliable than closer to shore. For the 2011 data, separate vessel types were also extracted separately and run in addition to the full dataset. These separate counts are included in the attribute table and include Cargo Vessels, Fishing Vessels, Tankers, Passenger Ships, Tugs, Towing Vessels less than 200 meters in length, and Towing Vessels more than 200 meters in length.

Access & Use Information

Public: This dataset is intended for public access and use. 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.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023
Publisher Bureau of Ocean Energy Management
Identifier e8e501a9-4e28-4f61-ad9c-fa785bff726a
Data Last Modified 2017-04-21
Category geospatial
Public Access Level public
Bureau Code 010:06
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 093c7386-eef2-40ee-9541-805b3dc01b61
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -126.066945,30.943491,-117.096527,49.012092
Publisher Hierarchy White House > U.S. Department of the Interior > Bureau of Ocean Energy Management
Source Datajson Identifier True
Source Hash 6924b307388120a5bba4644782ad70831040d3a7915170e6e993f0797f705037
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -126.066945, 30.943491, -126.066945, 49.012092, -117.096527, 49.012092, -117.096527, 30.943491, -126.066945, 30.943491}

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