USA topographic maps

Average elevation: 202 m

Average elevation: 40 m

Average elevation: 664 m

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Average elevation: 371 m

Average elevation: 86 m

Average elevation: 1,546 m

Average elevation: 58 m

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Average elevation: 6 m

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Average elevation: 323 m

Average elevation: 1,464 m

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Average elevation: 952 m

Average elevation: 136 m

Average elevation: 3,828 m

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Average elevation: 1,439 m

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Average elevation: 576 m

Average elevation: 44 m

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Average elevation: 661 m

Average elevation: 543 m

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Average elevation: 506 m

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Average elevation: 202 m

Average elevation: 75 m

Average elevation: 1,363 m

Average elevation: 202 m