Marin County/North Bay Land Surveyor. Licensed Surveying Engineers. Meridian Survey offers, Commercial Surveys, (Alta, Lending, Finance and Refi Surveying), Drone Surveys, FEMA Elevation Certificates, Hydrographic Surveys and HD 3D Scanning Surveys. Our principal Mr. Gray also often serves as and Expert Witness Surveyor in the San Francisco Bay Area. A few of our other specialties include: Settlement Monitoring Surveys (for buildings), SFP Approved Suryeys (SFO Airport) and we are also an SF LBE/SBE Surveying firm.