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Alaska Harbor Seal Aerial Survey Units
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
4 resources available
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https://services2.arcgis.com/C8EMgrsFcRFL6LrL/arcgis/rest/services/pv_cst_polys/FeatureServer
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https://noaa.hub.arcgis.com/datasets/noaa::alaska-harbor-seal-aerial-survey-units/about
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GCMD Keyword Forum Page
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Full Metadata Record
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Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | non-public |
| contactPoint |
{ "fn": "Cameron, Mike", "@type": "vcard:Contact", "hasEmail": "mailto:michael.cameron@noaa.gov" } |
| describedByType | application/octet-steam |
| 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. |
| distribution |
[ { "@type": "dcat:Distribution", "title": "https://services2.arcgis.com/C8EMgrsFcRFL6LrL/arcgis/rest/services/pv_cst_polys/FeatureServer", "accessURL": "https://services2.arcgis.com/C8EMgrsFcRFL6LrL/arcgis/rest/services/pv_cst_polys/FeatureServer", "mediaType": "text/html", "description": "Online resource", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "https://noaa.hub.arcgis.com/datasets/noaa::alaska-harbor-seal-aerial-survey-units/about", "accessURL": "https://noaa.hub.arcgis.com/datasets/noaa::alaska-harbor-seal-aerial-survey-units/about", "mediaType": "text/html", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "GCMD Keyword Forum Page", "accessURL": "https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords", "mediaType": "text/html", "description": "Global Change Master Directory (GCMD). 2026. GCMD Keywords, Version 24. 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", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "Full Metadata Record", "accessURL": "https://www.fisheries.noaa.gov/inport/item/17349", "mediaType": "text/html", "description": "View the complete metadata record on InPort for more information about this dataset.", "describedByType": "application/octet-stream" } ] |
| identifier | https://data.noaa.gov/waf/NOAA/nmfs/afsc/iso/xml/17349.xml |
| keyword |
[ "abundance", "aerial survey", "harbor seal", "Alaska", "coastal", "intertidal", "DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce", "Alaska Harbor Seal Surveys and Abundance" ] |
| landingPage | https://www.fisheries.noaa.gov/inport/item/17349 |
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2026-04-30T00:00:00.000+00:00 |
| publisher |
{ "name": "Alaska Fisheries Science Center", "@type": "org:Organization" } |
| rights | otherRestrictions, unclassified |
| spatial | -130.0,51.0,172.0,61.5 |
| theme |
[ "geospatial" ] |
| title | Alaska Harbor Seal Aerial Survey Units |
