It is called the scale ruler.
Graphic Scale
graphic scale It's called the scale.
Graphic Scale is the printed ruler on a map that can be used to measure the distances on the map.
The ruler printed on a map that is used to convert distances on the map to actual ground distances is called a scale bar. It visually represents the ratio of a distance on the map to the corresponding distance in the real world, allowing users to measure distances accurately. Scale bars are typically marked with specific measurements, such as miles or kilometers, making it easier to interpret distances without complex calculations.
The scale used to convert distances on a map to actual ground distance is typically represented as a ratio or fraction, such as 1:50,000 or 1/50,000. This means that 1 unit of measurement on the map (such as an inch or centimeter) corresponds to 50,000 of the same units in reality. Scales can also be shown as a graphic scale or bar scale, which visually indicates the relationship between map distance and ground distance.
A map scale lets you convert map distance to ground distance.
A map scale lets you convert map distance to ground distance.
A map scale lets you convert map distance to ground distance.
A map scale lets you convert map distance to ground distance.
A map scale lets you convert map distance to ground distance.
A map scale lets you convert map distance to ground distance.
A map scale lets you convert map distance to ground distance.
A map scale lets you convert map distance to ground distance.
A map scale lets you convert map distance to ground distance.
A map scale lets you convert map distance to ground distance.
A map scale lets you convert map distance to ground distance.
A map scale lets you convert map distance to ground distance.