Altamaha River, GA (S150) Bathymetric Digital Elevation Model (30 meter resolution) Derived From Source Hydrographic Survey Soundings Collected by NOAA

Description

Bathymetry for the Altamaha River was derived from three surveys containing 16,511 soundings. One less accurate, overlapping survey was deleted before tinning the data. The average separation between soundings was 49 meters. The three surveys used all dated from 1934. The total range of sounding data was 1.2 meters to -11.9 meters at mean low water. A mean high water value of 2.1 meters was assigned to the shoreline. One point was found that was not consistent with the surrounding data and was removed prior to tinning. DEM grid values outside the shoreline (on land) were assigned null values (-32676). The Altamaha River has five 7.5 minute DEMs and a single one degree DEM. The 1 degree DEMs were generated from the higher resolution 7.5 minute DEMs which covered the estuary. A Digital Elevation Model (DEM) contains a series of elevations ordered from south to north with the order of the columns from west to east. The DEM is formatted as one ASCII header record (A- record), followed by a series of profile records (B- records) each of which include a short B-record header followed by a series of ASCII integer elevations (typically in units of 1 centimeter) per each profile. The last physical record of the DEM is an accuracy record (C-record). The 7.5-minute DEM (30- by 30-m data spacing) is cast on the Universal Transverse Mercator (UTM) projection. It provides coverage in 7.5- by 7.5-minute blocks. Each product provides the same coverage as a standard USGS 7.5-minute quadrangle but the DEM contains over edge data. Coverage is available for many estuaries of the contiguous United States but is not complete.

Resources

Name Format Description Link
32 Download NetCDF File https://www.ngdc.noaa.gov/thredds/fileServer/regional/altamaha_river_s150_30m.nc
21 OPeNDAP Dataset Access Form https://www.ngdc.noaa.gov/thredds/dodsC/regional/altamaha_river_s150_30m.nc.html
21 Download a subset of the NetCDF https://www.ngdc.noaa.gov/thredds/ncss/regional/altamaha_river_s150_30m.nc/dataset.html
0 text search https://www.ngdc.noaa.gov/mgg/bathymetry/estuarine
52 Web Map Service GetCapabilities https://www.ngdc.noaa.gov/thredds/wms/regional/altamaha_river_s150_30m.nc?service=WMS&version=1.3.0&request=GetCapabilities
32 NetCDF Markup Language file https://www.ngdc.noaa.gov/thredds/ncml/regional/altamaha_river_s150_30m.nc?catalog=https%3A%2F%2Fwww.ngdc.noaa.gov%2Fthredds%2Fcatalog%2Fregional%2Fcatalog.html&dataset=regionalDatasetScan%2Faltamaha_river_s150_30m.nc
0 map search https://www.ngdc.noaa.gov/mgg/bathymetry/estuarine
50 Web Coverage Service GetCapabilities https://www.ngdc.noaa.gov/thredds/wcs/regional/altamaha_river_s150_30m.nc?service=WCS&version=1.0.0&request=GetCapabilities

Tags

  • altamaha river
  • bathymetry
  • oceans
  • united states
  • 1 meter - < 10 meters
  • coastal elevation
  • 1 meter - < 30 meters
  • earth science
  • bathymetry/seafloor topography
  • gridded elevations
  • coastal relief
  • water depth
  • coastal processes
  • ga
  • georgia
  • seafloor topography

Topics

Categories