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 Amarillo, TX to Vernon, TX is 176Miles or 283 Km. You can get this distance about 2 hours 47 mins. If you want to planning travel with plane for 164 Miles or 264 Km, You can get this distance about 51 mins . A car with an average MPG will needs 8.15 gallons of gas to get the route between these points.