1' of equator 



1' of latitude at equator 



1' of latitude at pole . 



= 6,087.129 feet 



= 2,029.043 yards 

 = 1,855.357 meters 

 = 1.153 statute miles 

 = 1.002 nautical miles 



= 6,045.719 feet 



= 2,015.240 yards 

 = 1,842.735 meters 

 = 1.145 statute miles 

 = 0.995 nautical mile 



= 6,107.943 feet 



= 2,035.981 yards 

 = 1,861.701 meters 

 = 1.157 statute miles 

 , = 1.005 nautical miles 



Flattening or ellipticity (^ = ^) = ^93^ 



= 0.00340756138 



Eccentricity (e = \j2f-f^ ] = 0.08248339904 



Eccentricity squared (e^ ) = 0.00680351 1 1 2 



International spheroid 



Equatorial radius (a) = 20,926,469.85 feet 



= 6,975,489.95 yards 

 = 6,378,388 meters 

 = 3,963.347 statute miles 

 = 3,444.055 nautical miles 



Polar radius (61 = 20,854,707.61 feet 



= 6,951,569.20 yards 

 = 6,356,514.870 meters 

 = 3,949.755 statute miles 

 , , , = 3,432,245 nautical miles 



Mean radius (-^r — I = 20,902,983.35 feet 



^ =6,967,661.12 yards 



= 6,371,229.315 meters 

 = 3,958.898 statute miles 

 = 3,440.190 nautical miles 



1' of equator = 6,087.264 feet 



= 2,029.088 yards 

 = 1,855.398 meters 

 = 1.153 statute miles 

 = 1.002 nautical miles 



1' of latitude at equator = 6,046.342 feet 



= 2,015.447 yards 

 = 1,842.925 meters 

 = 1.145 statute miles 

 = 0.995 nautical miles 



1' of latitude at pole = 6,107.828 feet 



= 2,035.943 yards 

 = 1,861.666 meters 

 = 1.157 statute miles 

 = 1.005 nautical miles 



Flattening or ellipticity (f = I = 



Ma/ 297 



= 0.00336700337 



Eccentricity (e = \/2f-f'^) = 0.08199188997 



Eccentricity squared (e 2 ) = 0.00672267002 



Energy 



1 joule = 0.10197 kilogram-meters 



= 0.7376 foot-pounds 



= 2.778 X 10"'' kilowatt hours 



= 3.725 X 10"' horsepower hours 



716 



