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Johnston Atoll topographic map

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Johnston Atoll

The four islands compose a total land area of 2.67 square kilometers (1.03 square miles). Due to the atoll's tilt, much of the reef on the southeast portion has subsided. But even though it does not have an encircling reef crest, the reef crest on the northwest portion of the atoll does provide for a shallow lagoon, with depths ranging from 3–10 m (9.8–32.8 ft). The climate is tropical but generally dry. Northeast trade winds are consistent and there is little seasonal temperature variation. With elevation ranging from sea level to 5 m (16 ft) at Summit Peak, the islands contain some low-growing vegetation and palm trees on mostly flat terrain and no natural fresh water resources.

About this map

Name: Johnston Atoll topographic map, elevation, terrain.

Location: Johnston Atoll, United States (16.50563 -169.77054 16.99060 -169.25228)

Average elevation: 0 m

Minimum elevation: 0 m

Maximum elevation: 11 m

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United States > Tennessee

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United States > Texas

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United States > Texas > Georgetown

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United States > California

Average elevation: 538 m