Sorry James for being so thick, but this doesn't help me at all! A drawing perhaps might help. Jack ----- Original Message ----- From: j a To: geocentrism@xxxxxxxxxxxxx Sent: Tuesday, November 20, 2007 8:11 PM Subject: [geocentrism] Re: 2 Axes of rotation - drawing brand new for you Jack, Never too late. The Baseline is the distance from the axis of rotation to the camera. JA.... Jack Lewis <jack.lewis@xxxxxxxxxxxx> wrote: Dear James, It's a bit late for me to be asking this, but what do you mean by the 'base line'? Jack