The datum is defined by the observed heights of mean sea level at the 26 tide gauges and by the set of elevations of all bench marks resulting from the adjustment. A total of 106,724 kilometers of leveling was involved, constituting 246 closed circuits and 25 circuits at sea level.
George Washingtonâs Mount Vernon is located roughly 15 miles south of Washington, D.C. and 8 miles south of Alexandria, Virginia on the banks of the Potomac River, at the southern end of the George Washington Memorial Parkway.
Distance, Gas Consumption and Emission Notes. Distance from Detroit, MI to Washington, DC is 526Miles or 846 Km. You can get this distance about 8 hours 6 mins. If you want to planning travel with plane for 395 Miles or 635 Km, You can get this distance about 1 hours 20 mins . A car with an average MPG will needs 24.35 gallons of gas to get the route between these points. The estimated cost of gas to get between Detroit, MI and Washington, DC is $55.27. During the route, an average car will release 477.07 pounds of CO2 to the atmosphere. Your carbon footprint is 0.91 pounds of CO2 per mile.