Hoover Dam Geodetic Survey Markers – Boulder City, Nevada - Atlas Obscura
Survey marker - Wikipedia
Historic markers installed at lighthouse, museum
Concrete Property Markers - Conigliaro Block
Survey Marker
Survey markers - Stainless steel QLD approved design. Australian Made.
Jason Rabinowitz on X: "Love to spot these geodetic survey markers out in the wild. Fun how the fine for messing with them seems to have stuck at $250 for nearly a
Surveyor Symbols & Signs - A Guide
Survey Markers and Caps for Rebar - Aluminum, Brass, Plastic
Aluminum Concrete Survey Markers - C35D
Mystery WMATA/Metro survey markers: Can any intrepid city planners or engineers explain what these discs are (or were) used for? I seem them all over the place, even sometimes away from Metro