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IanDowns-Hydrometry: Surveying with the ARC Boat
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IanDowns-Hydrometry: Surveying with M9 from manned boat
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IanDowns-Hydrometry: Surveying Castle Lake
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IanDowns-Hydrometry: castle lake 3 exaggerated 3d image
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IanDowns-Hydrometry: castle lake 2 areial image
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IanDowns-Hydrometry: castle lake 1 3D image