Elevations of Nine Marshes along the Virginia Coast, 2016-2019

Marsh elevation change was measured in nine sites through Global Positioning System (GPS) Real-Time Kinematic (RTK) surveys using Trimble R7 and R10.2 survey equipment. The data includes a table of processed results, plus raw RINEX inputs for the reference locations for each survey, along with OPUS (Online Positioning User Service) solution files for those reference locations. Additionally, ArcGIS data layers are provided both in a geodatabase and as individual shapefiles. Raw RTK surveys were adjusted based on the OPUS solutions for the fixed reference location associated with each survey. All elevations are relative to NAVD88 with GEOID12B and all horizontal locations use the WGS84 datum.