Robert Erwin has over 20 years of experience as a Land Surveyor in Virginia and California. He has been a Licensed Land Surveyor in the Commonwealth of Virginia since June 2006. Although he has experience in many types of land surveys (boundary, ALTA/NSPS, topographic & subdivision), he has particular expertise in construction surveying. As a Survey Project Manager he has managed many public and private projects including interstates, roadways, infrastructure and commercial/residential sites. In addition to traditional construction stakeout, many of these projects have included the preparation of highly detailed 3D digital models for GPS & UTS machine control systems.