Alaska Harbor Seal Aerial Survey Units

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.

Resources

Name Format Description Link
0 View the complete metadata record on InPort for more information about this dataset. https://www.fisheries.noaa.gov/inport/item/17349
0 AKFSC Home Page https://www.fisheries.noaa.gov/about/alaska-fisheries-science-center
0 Online resource Note: Dataset migrated by Dan Woodrich (AFSC data management coordinator) on 12/20/2021. Contact: Daniel.woodrich@noaa.gov https://console.cloud.google.com/storage/browser/nmfs_odp_afsc/MML/PEP/Alaska%20Harbor%20Seal%20Aerial%20Survey%20Units
23 Online resource https://services2.arcgis.com/C8EMgrsFcRFL6LrL/arcgis/rest/services/pv_cst_polys/FeatureServer
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
33 NOAA Data Management Plan for this record on InPort. https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/17349.pdf
0 https://noaa.hub.arcgis.com/datasets/noaa::alaska-harbor-seal-aerial-survey-units/about
0 View the complete metadata record on InPort for more information about this dataset. https://www.fisheries.noaa.gov/inport/item/17349
0 AKFSC Home Page https://www.fisheries.noaa.gov/about/alaska-fisheries-science-center
33 NOAA Data Management Plan for this record on InPort. https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/17349.pdf
23 Online resource https://services2.arcgis.com/C8EMgrsFcRFL6LrL/arcgis/rest/services/pv_cst_polys/FeatureServer
0 Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords

Tags

  • alaska fisheries science center
  • alaska
  • harbor seal
  • noaa
  • coastal
  • u.s. department of commerce
  • national marine fisheries service
  • doc/noaa/nmfs/afsc
  • abundance
  • intertidal
  • alaska harbor seal surveys and abundance
  • aerial survey

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