Version History for:
Pacific Walrus Coastal Haulout Occurrences Interpreted from Satellite Imagery

Current Citation:
Fischbach, A.S., Douglas, D.C. 2022. Pacific Walrus coastal haulout occurrences interpreted from satellite imagery (ver 3.0, February 2024): U.S. Geological Survey data release, https://doi.org/10.5066/P9CSM0KN

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Version 1.0 posted online September 2022

Original Citation:
Fischbach, A.S., Douglas, D.C. 2022. Satellite imagery of Pacific walruses on coastal haulouts near Point Lay, Alaska, autumn 2022: U.S. Geological Survey data release, https://doi.org/10.5066/P9CSM0KN

Overview:
Metadata record describing the full set of maps and haulout size estimates near Point Lay, Alaska. The maps and haulout size estimates themselves were considered sensitive while the walrus haulouts were occupied.

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Version 2.0 posted online December 2022

Overview:
Following the seasonal departure of walruses from the autumn haulout sites, the maps are no longer considered sensitive and are released publicly.

Released: maps, vector outline data, and land area estimates of walrus at a haulout near Point Lay, Alaska autumn 2022
Added: maps, vector outline data, and land area estimates of walrus at a haulout near Cape Serdtse-Kamen, Chukotka, Russia autumn 2022
Updated: metadata to more clearly describe the dataset.

Data:
walrus_dailySatelliteMaps - jpeg maps
walrus_dailyHauloutOutlines - vector data
walrus_hauloutArea - tabular data

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Version 3.0 posted online February 2024

Overview:
Vector outline data, maps, and land area estimates of walruses at known Chukchi Sea walrus autumn coastal haulouts in Alaska and Chukotka, Russia.

Added: vector outline data and land area estimates of walruses at Chukchi Sea coastal haulouts, autumn 2023