Ossabaw Sound (2015)
A 3 meter by 3 meter ESRI Grid file was generated to represent the Bathymetric surface of the Ossabaw Sound, Georgia area. Bathymetric soundings, sidescan sonar imaging, and sediment grain size data collection were conducted for selected areas of Ossabaw Sound, Vernon River, Little Ogeechee River, and Ogeechee River in Chatham County, Georgia to accurately map bottom topography and habitat type between 2015 and 2017. Three methods of field data collection were utilized to efficiently acquire data for bathymetry across various environments within the study area. Swath Bathymetry was collected using an interferometric swath bathymetry sonar over 32 survey missions for all major channels and shoals where water depth exceeded 2-3 meters MLLW. Single Beam echosounder data was collected over 28 survey missions for shallow zones where water depth was below 2-3 meters MLLW. RTK GPS data was collected on one survey mission for a selected shoal exposed at low tide. Existing Digital Elevation model (DEM) data from Chatham County, Georgia was incorporated for processing final Bathymetric data map.
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