Why not use a map in your head?
In my motorcycle days I used to have a map in my head.
And for those cases in which I needed to consult the map again I could look up the route again quickly using a paper map.
Nowadays I am more likely to use my iPhone map app. Sometimes there are blatant errors, which are obviously incorrect. These include telling us to turn the wrong direction (right/left), or turn the wrong direction onto a one way. We still have to use logic to avoid accidents.
When I am functioning as a navigator in a vehicle I find that reading the map on a iPhone screen is difficult. By the time I get oriented correctly on the iPhone app, we are often past the decision point that I was looking up.
So why not just use a paper map?
Because of the quick access of an iPhone, we no longer use the paper map as often, and consequently the paper map is often unavailable. Even if it is available, medical issues such as astigmatism and lack of dexterity cause problems when using a paper map.
In summary, it is important to lay out a route before leaving home.
What is the identifying point for a location?
I can “pointalize” a city by name only. For example, using Cheyenne, WY as a point. This takes us to the capitol building.