It is a graphic scale.
Graphic Scale is the printed ruler on a map that can be used to measure the distances on the map.
That is the scale of that map.
That is the scale of that map.
That is the scale of that map.
That is the scale of that map.
The printed ruler on map is called the scale. It shows distance per inch. You can take a strip of paper, lay it alongside the ruler, mark the paper--- then, take the marked paper to measure distance between two points on the map.
That is the scale of that map.
The map key or scale.
The map key or scale.
It's called a map scale.
Graphic Scale
A map scale lets you convert map distance to ground distance.