On Jan 14, 2008 10:18 AM, Lars Finsen <[log in to unmask]> wrote: > If you'd like to do this by hand, try y = (6.28 x cos(x/r)) / n, That 6.28 is presumably really 2* π.. 6.28 is probably sufficient for hand drawing, but it never hurts to put off the rounding 'til the end... > where y is the width of the wedge at x, r is the radius of the globe, > and n is the number of wedges. Make sure cos calculates in radians. Not sure what x signifies here... longitude of the center of the wedge? -- Mark J. Reed <[log in to unmask]>