minus-squaretheroastedtoaster@lemmy.worldtopics@lemmy.world•Ex marks the spot? [OC]linkfedilinkarrow-up11arrow-down1·21 days agoIt might be some sort of survey benchmark. If there’s one on each end of the bridge, it could be for measuring alignment of the movable section against the stationary section linkfedilink
It might be some sort of survey benchmark. If there’s one on each end of the bridge, it could be for measuring alignment of the movable section against the stationary section