OGeographer
An OGeographer is an OG or "Original Gangsta" who knows the layout of their local city very well. An OGeographer is able to give their fellow gang members the layout of the whole entire city and they can update that map of the city after new construction. A leading OGeographer is one who knows the layout of other cities very well. Leading OGeographers have skills in map making of various cities thus, leading them to also be an OGeographer in the area of cartography. OGeographers have a useful amount of OGeography at their disposal.
Once my crew was given the go ahead by the head of our gang to go do a drug dropoff in the neighboring city, we got our local OGeographer to contact the leading OGeographer. When that happened the leading OGeographer gave us a map of that neighboring city. It felt good knowing that our leading OGeographer was an expert in cartography.