Elevation at a specific point.

Watershed dividing two drainage basins.

Highest point of external surface.

an Act of Congress passed by the 61st United States Congress on June 1, 1910 to limit the height of buildings in the District of Columbia, amending the Height of Buildings Act of 1899.

an Act of Congress passed by the 61st United States Congress on June 1, 1910 to limit the height of buildings in the District of Columbia, amending the Height of Buildings Act of 1899.