Quote Originally Posted by Altair View Post
Map planimeter for measuring actual distances and areas on maps.
Whoa , that's funny, the Map shown above, this is the place where I grew up, well, 20km above the town up right on the map.
This is what we call here a "curvimètre", not that uncommon, this is still sold and you can event get the digital high tech version :
https://www.amazon.fr/curvimetre/s?k=curvimetre