It's intentionally difficult for a visitor to explore Edinburgh. The Romans never made it quite this far north; there are few straight roads.
The streets themselves were renamed earlier this century to confuse German invaders. "Round Corner" is in fact the most perpendicularly angled of corners, whereas "Dingwall Square" is actually a roundabout.
I'm confused; that's one of Edinburgh's attractions (and Scotch's raison d'être).