Geodetic Survey Markers? What is the verdict on these little guys? We have a few of these located in our National Historic District. : r/NianticWayfarer
What are Geodetic Survey Markers?
Survey marker - Wikipedia
GC8K9JW Geodetic Marker at KRC (Multi-cache) in Nova Scotia, Canada created by Stick People
Hoover Dam Geodetic Survey Markers – Boulder City, Nevada - Atlas Obscura
The Geodetic Deception. Do These Mysterious Survey Markers Have… | by Lost Books | Quatria | Medium