Alterac Valley

How much of it was built

A map's terrain is stored as tiles, each 533 yards square. Counting only the tiles with something actually built on them (which leaves out the empty ground a map pads its edges with) gives each battleground's real built area. Warsong Gulch is the yardstick.

Built area as multiples of Warsong Gulch. Every tile of every map was read, not sampled.

One caveat, because this is the figure most worth quoting. Built area is where terrain work exists, not where a player can walk. Alterac Valley's mountains are built ground to a level designer and a wall to everyone else. What this establishes is how much was made, not how much is playable, and not what the map is for, which only its queue rows say, and the card above states.

The evidence, tile by tile

For anyone who wants to check the numbers rather than take them. Each square is one 533-yard terrain tile as the client stores it, shaded by how much scenery sits on it; a dashed square is ground with nothing built on it. This is where every figure above comes from.