It serves as a 6-player StarCraft II multiplayer map.
There's 2 island golden minerals on the corners, one in southeast and another in northwest, and another two with destructible rocks near these islands. The two xel'naga towers are located near an expansion each, both in the central area.
Blizzard Entertainment. StarCraft II. (Activision Blizzard) Map: Dig Site (in English). 2010.