Bronze level automatically awarded US beta

This data has achieved Bronze level on 25 October 2015 which means this data makes a great start at the basics of publishing open data.

Ship Traffic 2011 West Coast Region - All Ship Types

Description

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.

General Information

Legal Information

This dataset has been created by US Government which means it is required to be in the public domain. However US copyright law only allows open access by US citizens, we have assumed the data is equivalently licensed as CC0 for the rest of the world as this is in the spirit of the US Government’s Open Data policy.

  • The rights statement is at

    http://catalog.data.gov/dataset/ship-traffic-2011-west-coast-region-all-ship-types Do you think this data is incorrect? Let us know

  • Outside the US, this data is available under

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  • There are

    yes, and the rights are all held by the same person or organisation Do you think this data is incorrect? Let us know

  • The content is available under

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  • This data contains

    no data about individuals Do you think this data is incorrect? Let us know

Practical Information

  • The data appears in this collection

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  • This data changes

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Technical Information

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  • Find out how to contact someone about this data at

    http://catalog.data.gov/dataset/ship-traffic-2011-west-coast-region-all-ship-types Do you think this data is incorrect? Let us know

  • Find out how to suggest improvements to publication at

    http://www.data.gov/issue/?media_url=http://catalog.data.gov/dataset/ship-traffic-2011-west-coast-region-all-ship-types Do you think this data is incorrect? Let us know