GPS is used in building bridges and marking spots accurate to withing a few cm. But for that you need specialized equipment. https://www.roadtraffic-technolog

GPS is used in building bridges and marking spots accurate to withing a few cm. But for that you need specialized equipment. https://www.roadtraffic-technology.com/projects/millau_viaduct/ https://www.roadtraffic-technology.com/projects/millau_viadu...