An article in the January, 2005 Sky and Telescope describes a technique to use Photoshop to project 2D images of the moon onto a 3D sphere and then rotate the sphere to simulate looking down from overhead.
As usual in the world of computing, the 3D Transform filter is not installed by default in Photoshop CS3, but there is a zipped copy available online. Here is my first try; Crisium from overhead, and the original copied from a five day old moon image.
As you can see, Crisium is actually wider than it is tall.
This is taken from a 1:10,000,000 Lunar Chart published by NASA. (Enlarged 300% from original 150dpi)