Topographic Maps |
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Approximate mean high water line. The average limit of dry land during periods of highest water level (e.g., high tide). USGS topographic maps set the shoreline at the mean high water line. | |
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Indefinite or unsurveyed. | |
Topographic-Bathymetric Maps |
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Mean high water line. | |
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Apparent (edge of vegetation). Representation of the vegetative border is considered approximate because this line cannot be accurately identified on the ground, due to intricate growth patterns and change over time. | |