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2021 Map of Unimak C-1 NW, 2021 Print
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2021 Map of Unimak C-1 NW

USGS Topo · Published 2021

About this map

Fisher Caldera dominates this section of Unimak Island in the Aleutians East Borough, where the volcanic topography of the Aleutian Range is meticulously documented by the U.S. Geological Survey. The 2021 data emphasizes the island's complex geomorphology, showing the drainage patterns and significant elevation changes across the caldera floor. Surveyed using Spot imagery and the National Elevation Dataset, the map provides precise contour intervals that trace the interior and exterior slopes of this massive volcanic feature. The grid system includes divisions for t63s r100w and t64s r100w, offering a structural look at the land management boundaries in this uninhabited maritime environment. This map is a critical record for understanding the modern physical geography of the island at the edge of the Bering Sea.

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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 C-1 NW 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