Description
- The Curvimeter or opisometer is a device that measures the length of curved lines and helps to calculate the distance between the points on a map more precisely than a ruler or a compass.
- The mechanism has a measuring wheel, a clock face, and a hand.
- When the wheel moves along the line on a map that you need to measure, the hand moves around the clock face marked with measuring unitscentimeters, inches, etc.
- All you need to do in the end is to check the map scale and to multiply your data by the denominator in the scale
