BOAC yes indeed when we use a paper map it is flat..uses two dimensions x and y..
I can remembr the formula for the volume of a sphere think that is 4/3PI R to the cube.
so we have 1,34 x 3.142 x the cube of the radius
but thats all I can remember. The surface equation I can't remember. Think one nautical mile is that distance subtended by one minute..or have I got that wrong?
Last edited by DERG; 1st Mar 2011 at 15:03.