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Aerial Survey Units for Harbor Seals in Coastal Alaska

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Release Date
26 September 2015
Modified Date
26 September 2015
Update Frequency
asNeeded
Publishers
National Oceanic and Atmospheric Administration, Department of Commerce
Identifier
aerial-survey-units-for-harbor-seals-in-coastal-alaska
Landing Page
http://catalog.data.gov/dataset/aerial-survey-units-for-harbor-seals-in-coastal-alaska
Language
eng

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Description

Aerial surveys of coastal Alaska are the primary method for estimating abundance of harbor seals. A particular challenge associated with aerial surveys of harbor seals is maintaining consistent spatial representation of haulout locations. In some cases, seals aggregate into a single large grouping at a particular area. In other cases, seals aggregate into several smaller groups spread over a particular area. To establish geo-spatial consistency, the Alaska Fisheries Science Center developed coastal survey units (spatial polygons) throughout the distriubtion of harbor seals in Alaska. Each survey unit was designed to be approximately 10-15 kilometers in coastal length, to faciliate efficient aerial surveys, and to aggregate known harbor seal haulout locations. Each survey unit was assigned a unique alphanumeric identifier and the spatial data are provided in the geographic (epsg:4326) coordinate reference system. The survey units form the spatial foundation for estimation of harbor seal abundance and trend.

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/aerial-survey-units-for-harbor-seals-in-coastal-alaska Do you think this data is incorrect? Let us know

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  • There are

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  • Find out how to contact someone about this data at

    http://catalog.data.gov/dataset/aerial-survey-units-for-harbor-seals-in-coastal-alaska Do you think this data is incorrect? Let us know

  • Find out how to suggest improvements to publication at

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