Schematic City is the second layer of downWorld. After you battle your way through Wired Wilderness you will be able to move on here.
When you first come to Schematic City you find yourself at the Breach. After battling your way through the Breach you will arrive at The Safe House (Hub 2). From the Safe House you can access many challenges, Armory 2 (better weapons than Armory 1 at Wired Wilderness), and even the WOLF Headquarters!
As you can tell, Schematic City is much larger than Wired Wilderness.