Geospatial World: What are various technologies to map subsurface infrastructure?
dgt2019-11-12T17:10:41+00:00Michael Twohig featured in Geospatial World article on subsurface [...]
American Locator Magazine: Beyond the 811 Ticket – Locating Utilities During Excavation
dgt2019-11-12T17:11:05+00:00Michael A. Twohig Quoted in American Locator Magazine [...]