I don't know if I can speak specifically to the coordinates, but you can tell which row the keys belong to by how steeply they're sloped, with the flattest ones going in the front and the more sloped ones in the back. The F-key row is the same as the number row. Keys that are the same width and are in the same row are interchangeable. In other words, A, S, D...L, :, " are all identical.