_TW06_ t1_j29rjmr wrote on December 30, 2022 at 5:56 PM Reply to 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 stops. by LilGeographersRoom They are indeed survey markers… explore this map, it’s pretty interesting. https://geodesy.noaa.gov/NGSDataExplorer/ Permalink 48
_TW06_ t1_j29rjmr wrote
Reply to 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 stops. by LilGeographersRoom
They are indeed survey markers… explore this map, it’s pretty interesting.
https://geodesy.noaa.gov/NGSDataExplorer/