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.aegrotatio t1_j2a84v7 wrote
Reply to comment by LilGeographersRoom in 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
Even when very far away from Metro entrances on the surface you are still standing above or near a station, tunnel, or other Metro structure. Metro stations are massive.
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