on the map itself it usually says how much an inch is. usually in the lower right corner.
To find how far an inch is on a map, look for the map scale. It will indicate how many miles is in an inch.
You would look at the scale on the map.
Map scale
In the key
The map scale is usually located in the legend box of a map.
The key.
To find out how far an inch on a map represents in actual distance, you would need to look for the map's scale. The scale of a map indicates the ratio between a unit of length on the map and the corresponding distance on the ground. Typically, the scale is provided in the map's legend or key. By using this scale, you can calculate the actual distance represented by an inch on the map.
it's called a scale
there should be a key on the map and that is most likely where you can find that info. : )
3/4 of an inch
You find that out by looking at the map's scale bar.
it is 100 miles