Pacific Walrus Coastal Haulout Occurrences Interpreted from Satellite Imagery

This data package is based on images are from a variety of Earth observing satellite imagery sources collected at known Chukchi Sea walrus coastal haulouts in Alaska and Chukotka, Russia. Earth observing imagery sources used in this data release include (but are not limited to) optical imagery collections by: (1) the European Space Agency's Sentinel-2 mission, (2) the Plant Labs Planet Scope constellation, and (3) Maxar satellites, as well as synthetic aperture radar imagery collected by: (1) European Space Agency's Sentinel-1 mission, (2) the DLR (German Aerospace Agency) TerraSAR-X satellite, (3) the Umbra Space satellite constellation, (4) the Canadian Radarsat-2 satellite, (5) the Capella Space satellite constellation and (6) the Finnish Iceye constellation. This data package provides: A) geospatial polygon outlines of walrus herds apparent to trained interpreters in satellite images; B) a table listing the satellite images examined that had clear views of the walrus coastal haulout study sites and the area of all walrus herds (if any were present) summarized from the geospatial polygon outlines of walrus herds apparent to trained interpreters, and C) maps (not available for all haulouts in all years) showing interpreted herd outlines superimposed on the satellite images.

Suggested Citation: Fischbach, A. S. and 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.

Version History:
First release: September 2022
Revised: December 2022 (ver. 2.0)
Revised: February 2024 (ver. 3.0)

Metadata
List of all satellite images examined [CSV]

Data sets included:

Location	Year	Data
Point Lay, Alaska
	2022	Zip file [46.3MB]
	2023	Zip file [1MB]
Icy Cape, Alaska
	2023	No walrus observed at this location (see list of satellite images above).
Chegitun River Mouth, Russia
	2023	No walrus observed at this location (see list of satellite images above).
Cape Inkigur, Russia
	2023	No walrus observed at this location (see list of satellite images above).
Cape Serdtse-Kamen, Russia
	2022	Zip file [9.6MB]
	2023	Zip file [1MB]
Cape Vankarem, Russia
	2023	No walrus observed at this location (see list of satellite images above).
Somnitel'naya Spit, Russia
	2023	No walrus observed at this location (see list of satellite images above).
Cape Blossom, Russia
	2023	No walrus observed at this location (see list of satellite images above).