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2021 Map of Unalaska B-4 SW, 2021 Print
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2021 Map of Unalaska B-4 SW

USGS Topo · Published 2021

About this map

The Bering Sea dominates this maritime survey, illustrating the underwater topography and coastal boundaries of the Aleutian Islands region. The map focuses on the submerged features of the continental shelf, most notably the steep descent of East Bogoslof Canyon, which marks a significant transition in the seafloor landscape. Along the rugged coastline, McIver Bight provides a named reference point for the intersection of land and water in this isolated part of the archipelago. This 2021 edition provides a clear view of the Public Land Survey System grids, including t77s r123w and t77s r124w, which are essential for identifying specific maritime and coastal locations within the Aleutians West Census Area.

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Map Details

Date Portrayed2021
Date Published2021
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:25,000
Physical Dimensions24 x 29 inches

Editions of this 2021 Unalaska B-4 SW Map

This is the sole edition of this map. No revisions or reprints were ever made.

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain