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[Solved] Anyone know what this is? They are embedded in the sidewalks around the city
(programming.dev)
Let us help you identify that mysterious object you’ve found.
Currently in CHALLENGE mode: If you've got something obscure knocking about, post a picture, and let's see how we do. Please prefix such posts with "CHALLENGE:" so we know we've got a fighting chance.
A marker point for geodetic marking. Also known as triangulation station or trigonometrical point, it's fixed to the ground with its known coordinates.
Cool! Interesting, I thought True North meant that they somehow pointed north given another reference. Thanks for the info.
https://www.rmg.co.uk/stories/topics/true-north-magnetic-north-whats-difference