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2021 Map of Unimak D-1 SW, 2021 Print
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2021 Map of Unimak D-1 SW

USGS Topo · Published 2021

About this map

Unimak Island serves as the primary landmass in this 2021 topographic study of the Aleutians East Borough. The landscape is defined by an intricate network of coastal wetlands and small water bodies that dominate the low-lying northern sections of the quadrangle. As the terrain moves south and west, the contours rise sharply, indicating the steep slopes of the island's volcanic or mountainous interior. This modern survey, produced by the U.S. Geological Survey, utilizes high-resolution imagery and the North American Datum of 1983 to document the shifting hydrography of this isolated Alaskan environment. The map provides a precise layout of the Public Land Survey System, showing the divisions of Township 61 South through Township 63 South across Ranges 99 and 100 West.

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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 Unimak D-1 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