GLA. Surveyor, Inc. 1158 South main Street Plymouth, MI 48170 (734) 416-9650 (voice) (734) 416-9657 (fax) Web Page Please contact: Greg L. Ash P.L.S. Providing Land Surveying in Metro Detroit Area since 1993 Specialties Include: Boundary and Lot Surveys, ALTA Surveys, Residential Site Plans, Construction Staking, Land Development, Plat Documents, Condo Documents, Topographic Surveys, Elevation Certificates, Elevation Monitoring Services, GPS Services and much more.