So I've been playing in Yahhoy west, and I'm at lvl 18 now. But the area that I'm playing quests in is down near the Oil Fields, Yongasan, etc. My world map has a greyish/blue grid covering it all, and I can't see anything where I'm at.

you need to find map revealers. they are big blue orbs on a pedestal. they are in random areas of each map.

use the interactive map to find them in dbocom.com