Mississippi Sound, MS/LA/AL (G170) Bathymetric Digital Elevation Model (30 meter resolution) Derived From Source Hydrographic Survey Soundings Collected by NOAA

Bathymetry for Mississippi Sound was derived from thirty-three surveys containing 371,210 soundings. Five overlapping, older, less accurate surveys were omitted before tinning. The average distance between soundings was 89 meters. The thirty-three surveys used dated from 1960 to 1979. The range of soundings for the surveys used was 0.8 meters to -17.6 meters at mean low water. A mean high water value of 0.5 meters was assigned to the shoreline. Twenty-five points were found that were not consistent with the surrounding points. These were removed prior to tinning. DEM grid values outside the shoreline (on land) were assigned null values (-32676). Mississippi Sound has forty-four 7.5 minute DEMs and three one degree DEMs. 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.

                                            {
  "fn": "NOAA National Centers for Environmental Information",
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                                            [
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    "@type": "dcat:Distribution",
    "title": "Download NetCDF File",
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    "description": "Download NetCDF File",
    "downloadURL": "https://www.ngdc.noaa.gov/thredds/fileServer/regional/mississippi_sound_g170_30m.nc",
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                                            [
  "Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography",
  "Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry",
  "Earth Science > Oceans > Bathymetry/Seafloor Topography > Water Depth",
  "Earth Science > Oceans > Coastal Processes > Coastal Elevation",
  "1 meter - < 30 meters",
  "1 meter - < 10 meters",
  "Coastal Relief",
  "Gridded elevations",
  "Bathymetry",
  "Mississippi Sound",
  "Mississippi",
  "Louisiana",
  "Alabama"
]
                                        

                                            []
                                        

                                            {
  "name": "NOAA's National Ocean Service, Special Projects (SP)",
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