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
5 resources available
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https://services2.arcgis.com/C8EMgrsFcRFL6LrL/arcgis/rest/services/pv_cst_polys/FeatureServer
TEXT/HTML -
https://noaa.hub.arcgis.com/datasets/noaa::alaska-harbor-seal-aerial-survey-units/about
TEXT/HTML -
NOAA Data Management Plan (DMP)
PDF -
GCMD Keyword Forum Page
TEXT/HTML -
Full Metadata Record
TEXT/HTML
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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 |
[
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"title": "https://services2.arcgis.com/C8EMgrsFcRFL6LrL/arcgis/rest/services/pv_cst_polys/FeatureServer",
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"accessURL": "https://noaa.hub.arcgis.com/datasets/noaa::alaska-harbor-seal-aerial-survey-units/about",
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{
"@type": "dcat:Distribution",
"title": "NOAA Data Management Plan (DMP)",
"format": "PDF",
"mediaType": "application/pdf",
"description": "NOAA Data Management Plan for this record on InPort.",
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"describedByType": "application/octet-stream"
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"title": "GCMD Keyword Forum Page",
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"mediaType": "text/html",
"description": "Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. 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"
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|
| 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 | 2026-03-04T19:17:17.000+00:00 |
| publisher |
{
"name": "Alaska Fisheries Science Center",
"@type": "org:Organization"
}
|
| references |
[
"https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/17349.pdf"
]
|
| rights | otherRestrictions, unclassified |
| spatial | -130.0,51.0,172.0,61.5 |
| title | Alaska Harbor Seal Aerial Survey Units |
