2003 GPS shorelines for Hog, Wreck, and Metompkin Islands, VA

This dataset was collected by Curtis Smith during the summer of 2003 as a Research Experiences for Undergraduates (REU) participant. It consists of Global Positioning System (GPS) lines collected by walking high-tide and vegetation (Hog Island only) lines using a Trimble Geoexplorer XT GPS unit. The resulting data was processed with GPS Pathfinder Office using differential correction. All data are in the UTM (zone 18) and the WGS-84 projection was used throughout. During the repeated surveys of Hog, Curtis was developing methodologies and conventions for surveying sometimes confusing high-tide lines. Each shapefile name contains the island and the date of the survey within 2003 in the form Rmmdd where mm is the month and dd is the day. For example Hog_R0717_05A.shp would be Hog Island, VA on July 17, 2003. The raw GPS position files are also included. These proprietary (.SSF) files require the Trimble Pathfinder Office software to be interpreted.  Individual shapefiles for each survey day were later (2013) combined into a single shapefile with the island and date identified as attributes. Â