How can I find survey benchmark and triangulation station information? | U.S. Geological Survey
GC8K9JW Geodetic Marker at KRC (Multi-cache) in Nova Scotia, Canada created by Stick People
What are Geodetic Survey Markers?
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
Survey Mark Recovery
Hoover Dam Geodetic Survey Markers – Boulder City, Nevada - Atlas Obscura
Geodetic survey marker hi-res stock photography and images - Alamy