USA topographic maps

Average elevation: 202 m

Average elevation: 40 m

Average elevation: 664 m

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Average elevation: 282 m

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Average elevation: 371 m

Average elevation: 58 m

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Average elevation: 1,546 m

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Average elevation: 164 m

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Average elevation: 268 m

Average elevation: 6 m

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Average elevation: 1,213 m

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Average elevation: 677 m

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Average elevation: 323 m

Average elevation: 1,464 m

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Average elevation: 231 m

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Average elevation: 1,439 m

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Average elevation: 746 m

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Average elevation: 846 m

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Average elevation: 576 m

Average elevation: 44 m

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Average elevation: 5 m

Average elevation: 661 m

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Average elevation: 255 m

Average elevation: 506 m