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President's Day marked a special announcement for the National Geodetic Survey (NGS). On Monday, NGS announced the results of a height measurement study of the Washington Monument. Using new international measurement standards and technology not available in the past, NGS calculated the official architectural height of the Washington Monument to be 554 feet 711⁄32 inches.
The height is accurate to within plus or minus one-thirty second of an inch—or one millimeter. Additionally, the methods used for measuring allow the structure to be included in official registers of the world’s tallest structures.
How does this compare to the historical height? Learn more here.
W. Russell Callender, Ph.D.
Acting Assistant Administrator for Ocean Services and Coastal
Zone Management, National Ocean Service