OK; this is a pretty silly question but here goes.
My favourite fictional world is, of course, Terry Pratchett's Discworld. It's eccentric, witty and weird fantasy which pokes fun at modern culture, parodies old tales, gently criticizes Human nature, etc.
Geographically, the Discworld is a disc 10,000 miles across; resting on the shoulders of four giant elephants; who perch on the back of Great A'Tuin - the Star Turtle (and the only known member of the species Chelys Galactica.)
Only Terry Pratchett could get away with that.
I couldn't help but wonder - given the Disc's size; how much liveable land would it have in comparison with Earth?
The Disc is a 10,000 mile frisbee; the Earth is an 8,000 mile ball (or thereabouts.) Both appear to have a similar water-land ratio, both have a wide range of environments and climates; from the frigid mountains of the Ramtops to the deserts of Klatch. Of course, it's patently silly to try comparing a world run by natural rules with a world run by magic; but simply in geographic area - how much greater is Earth's liveable land area than that of the Disc? I'm assuming it's greater given the greater surface area of a sphere but I've no idea how to make even an educated guess.
Here's a map (or rather, mappe) of the Discworld:
Knowing it's dimensions - 10,000 mile diameter - is it possible to guesstimate the liveable area?