Map planimeter for measuring actual distances and areas on maps.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...l_fullsize.jpg
Early personal and in-car navigation - photos
ancient Chinese south-pointing chariot
Last edited by Jon; 01-18-2020 at 07:35 PM.
Never try to tell me it can't be done
When I have to paint I use http://kbs.justoldtrucks.com/
AMS :: Feature Column from the AMS
Of course, if you're out camping in the forest and have an urgent need to calculate an area, you can always use your pocket knife as a planimeter...
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 :
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