Opisometer
Measuring the distance on a map on a scale bar is easy. t is a tool called divider.
Multiply distance by the scale bar
Scale
A direct mileage scales is a useful tool that shows distance on a map. This is a scaled down chart that compares the distance on a map with the actual distance.
for measuring distance
By measuring the distance between them on the map and comparing that distance on the scale.
choose the map tool that tells you what the map is about ascale,a title, or compose rose
The scale on the map shows you how to relate distance on the map to real distance.
The measuring line is one of a group of symbols -- or keys -- used in mapping to provide rich information using small and accessible icons.Specifically, this line is called the scale.
Distance on the map to distance on the ground is converted using the scale on the map.
The part of the map that explains what the map's symbols mean is called the legend. Besides notating what symbols are included in the map, a map legend also has a device made for measuring distance that shows how many miles to an inch or more.
Usually for plotting a place on a map. Widely used in marine navigation.