The Roads and Traffic Authority of NSW (RTA) proposed to create an eight metre clear ? zone along a section of Newell Highway on both sides of the road between Corobimilla and Tocumwal. NGH Environmental was engaged by the RTA to map tree locations and ecological data along the site. Due to the length of the project we had to come up with innovative ideas to map trees along the site. We teamed with a specialist technology firm to develop a state of the art GPS location system which could be operated from a vehicle.