Black - Roads (Existing and New)
White - Railroad extensions Area 1. Northeast
White - Military Airstrip
Grey - Hangers (Enterable and non-enterable)
Green - Forest to spread the airfield out (Put trails going through and a couple roads connecting to the current Mt. Holly
Burgundy - Barracks and or Firing Ranges
Area 2. North Middle
Basic Idea - Swamp, diversify the map a bit.
Blue - water The upside down T at the south of the circle is a waterfall. Would be great for screenshots/marketing promos. Green/Brown - Land, swamp city idea with a lot of small islands connected by the current dock model you already have.
Black - Roundabout observer area beside the waterfall to make it like a tourist attraction.
Area 3. Northwest
Basic Idea - Robot Factory/Industrial(warehouses, mining, etc.) OR Shopping District(Malls/grocery stores) OR Canyon Area (mining equipment, old minecart tracks, worn down rock and dirt, no grass)
Yellow - IDK, kinda just put it there not thinking about it
Area 4. West Middle Basic Idea - New city, split pvp so Redsville isn't so Overpopulated
Area 5. Southwest
Basic Idea - Airport
Grey dots - ATC/Maintenance/Hanger Buildings
Grey Square - Barracks if military, Airport Terminal if Civilian
Yellow - Parking lots/Parking garages
Pink - Fence
Area 6. South Middle
Basic Idea - Farm Extension
After I made the map, I thought that whatever idea you don't do in Area 3 would work well in the southeast/east middle of the map. That wall of rocks to the northeast of golden eagle would be a great cave/canyon entrance.
Hope you like my ideas, don't forget to +rep ❤️