Yeah, it doesn't display them now, but I'll fix it so it does in next update. Hoping to name them, but have been putting it on the long finger until the layout and size of the map is closer to final. You're right on the data structure - it's a 2D list, and the top left corner is 0,0.
The order in which info is revealed might be mixed up - it basically picks a tile and reveals the next piece of info on it, raising the intel level just above the required level to get the information. Gang is most basic, then danger level, and I think it should be crime rate and then wealth (though it's difficult to decide which of these is the most valuable). Might have the order of wealth and crime rate panels mixed up - will investigate.