Geodetic marker in Gatineau park Photograph by Frederick Belin - Pixels
Hoover Dam Geodetic Survey Markers – Boulder City, Nevada - Atlas Obscura
Geodetic Survey Marker Set in a Pavement. Stock Photo - Image of distance, deformation: 148053068
The Geodetic Deception. Do These Mysterious Survey Markers Have… | by Lost Books | Quatria | Medium
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 marker, satellites help scientists track sea levels | San Luis Obispo Tribune