A curvimeter is a device for measuring the length of a route on a map, such as a road map or a topographic map. A route almost never consists of a straight line, but through the roads or paths, there are often many curves. A ruler is therefore useless for measuring them. However, devices have been designed for this purpose: curvimeters. There are mechanical and electronic curvimeters. All curvimeters have a wheel at the bottom that can be used to follow the route on the map. The mechanical ones resemble a stopwatch with one hand. They do not have seconds and minutes on the dial, but distances. Colored rings show the different scales of maps. The 0 kilometer is at the top. When the wheel is driven over the map, the pointer moves and shows the distance covered. In case the distance is so long that the pointer goes all the way around clockwise, another rotating plate protrudes outside the rim indicating how many times the pointer has gone around. When the scale of the map cannot be found on the two dials of the curvimeter, the 1:100,000 scale can be taken because at this scale, 1 centimeter on the map coincides with 1 kilometer in the field. So the number of "map centimeters" is then known - some arithmetic still needs to be done. To get a good idea of the plot we advise you to come to the viewing day.