I knew that Coruscant's undercity received no light, but I didn't realize how big it was. In the trailer for the upcoming game Star Wars 1313, a panoramic shot of level 1313 is shown:
You can easily see large skyscrapers in the level, so it's not like each level is one story tall. According to wookiepedia,
Level 1313, one thousand three hundred and thirteen levels from Coruscant's core, was a ruthless criminal underground situated deep below the surface of Coruscant.
So the number corresponds to how many levels above the planet's surface it was, not feet or meters or anything. My question is, how deep (quantifiable in feet, meters, or miles) was the actual surface of Coruscant buried?