How to make and use an A frame for plotting a contour

An A-frame is a very simple tool for finding and plotting out a contour on a piece of land. In this video we show you how to use an A-frame and how to make an A-frame with just a few pieces of wood, some screws and some string (and an optional spirit level).

[@kya_argiedenoso3847]

Thank you, I already got it. This solves my problem in my subject in Watershed Management ❤

[@chrisbouris3699]

yeap I finally got it. I think you just save me a bunch of money for not buying that lazer. Thanks a lot

[@monoarhossain524]

Thank you

[@achsahkaleb4844]

best video of how to use it. pity you used a wide lens.

[@anthonyburke5656]

This is the primary instrument used by builders of the Roman Empire, they called it a “Groma”. It wasn’t a Roman Invention, they got it from the Etruscans, who got it from the Greeks, who got it from the Middle East!

[@malcolm2587]

Take a tripod and a a rifle scope and 8in torpedo a stick with a rule on it very similar to what the Egyptians used to build the pyramids