I've looked at this map the first time now and i basically learned all of it exept some vehicle spawns just playing the game - without consulting outside scrouces.
Containers, towns and places like the school or the military base have the best stuff. If you pay attention to where people jump you figure that out very quickly.
Cars are a bit more tricky. But eventually you learn where to expect a car and where not.
I don't think there's outside knowledge required here. It's just the kind of nuances you eventually learn that every competitive game has. And i don't know, discovering the good places was kind of fun.