I’m from California, but I just spent three months living in Michigan and was pleased to find that Michiganders really do regularly reference their state’s geography or the location of certain cities by using their own built-in Michigan hand map.
I should point out that we from Wisconsin use a modified version of the Michigan hand map. With your right palm facing you, squeeze your thumb’s first knuckle toward your index finger. Leave the tip of your thumb arcing out, like you’re taking an oath. That’s Wisconsin. Your wrist is the border with Illinois, your thumb is Door County, and your pinky and ring fingers are the state’s shores of Lake Superior.