Gas Line GPS Surveying by Gary Gardiner | Mar 6, 2019 Gas Line GPS Surveying – A surveyor uses a GPS system to mark the location of gas lines under streets and leading to structures in Uptown Westerville as Columbus Gas prepares to upgrade sections of its service. My Final Photo for March 6, 2019. Submit a Comment Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website This site uses Akismet to reduce spam. Learn how your comment data is processed.