In accordance with SO #3423 - The Gulf of America and SO #3424 - Mount McKinley and Landmarks Honoring the Alaskan People, new USGS data releases specific to those named places will utilize the new name Gulf of America and the restored name Mount McKinley. Per USGS practice, historical data will retain the name of the geographic features as they were known at the time the data were originally released.
Data Release
Multibeam Bathymetry Data Collected in 2016 from Grand Bay Alabama/Mississippi
By Chelsea A. Stalk, 1 Jake J. Fredericks, 2 Stanley D. Locker, 3 and Cody S. Carlson 4
1 Cherokee Nation Technologies
2 U.S. Geological Survey
3 University of South Florida College of Marine Science
4 Seafloor Systems Incorporated
Summary
The U.S Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) conducted a reconnaissance multibeam bathymetry (MBB) survey in Grand Bay Alabama/Mississippi on May 12th, 2016, as an assessment of the shallow water capabilities of a Teledyne Reson SeaBat T50-P multibeam echosounder. The survey is a part of an ongoing wetland/estuarine sediment study being conducted by the Sea level and Storm Impacts on Estuarine Environments and Shorelines project (SSIEES). The objective was to determine the feasibility of imaging eroding marsh edges at areas of interest around the bay. To extend horizontal coverage and map the eroding marsh edge, the T50-P head was tilted at an angle of 30° towards the port side of the vessel. Over 12 line-kilometers of data were acquired at three survey sites; Site 1 at the mouth of Bayou Heron, Site 2 in the south-western portion of Grand Bay, and Site 3, located in the western portion of Middle Bay. Data are provided in x,y,z format at a 0.50 meter spatial resolution in the World Geodetic System of 1984 (WGS84), the North American Datum of 1983 (NAD83, [2011]) and the North American Vertical Datum of 1988 (NAVD88), model GEOID12A. For further information regarding data collection and/or processing please see the metadata associated with this data release.
Note: This data release was versioned on July 16, 2020. Please see the Suggested Citation section for details.
Data
| File Name and Description | Metadata (XML format) | Metadata (text format) | Download File |
|---|---|---|---|
| Grand_Bay_2016_MBB_Unadjusted_xyz.zip 0.50 m resolution xyz data provided in WGS84, NAD83, and NAD83 NAVD88 GEOID12A, sorted by datum and site (.txt) |
Grand_Bay_2016_MBB_ Unadjusted_xyz_metadata.xml |
Grand_Bay_2016_MBB_ Unadjusted_xyz_metadata.txt |
Grand_Bay_2016_MBB_ Unadjusted_xyz.zip (7.5 MB) |
| Grand_Bay_2016_MBB_Adjusted_xyz.zip 0.50 m resolution xyz data provided in WGS84, NAD83, and NAD83 NAVD88 GEOID12A, sorted by datum and site, vertically adjusted to match previous local bathymetry data (.txt) |
Grand_Bay_2016_MBB_ Adjusted_xyz_metadata.xml |
Grand_Bay_2016_MBB_ Adjusted_xyz_metadata.txt |
Grand_Bay_2016_MBB_ Adjusted_xyz.zip (7.4 MB) |
| Grand_Bay_2016_MBB_Tracklines.zip Multibeam bathymetry survey tracklines (.shp) |
Grand_Bay_2016_MBB_ Tracklines_metadata.xml |
Grand_Bay_2016_MBB_ Tracklines_metadata.txt |
Grand_Bay_2016_MBB_Tracklines.zip (4.6 MB) |
Figure 1. Location map of the three sites surveyed for the 2016 multibeam bathymetry survey within Grand Bay Alabama/Mississippi. Study area extent is indicated by the red box within the regional map. Base map modified from USGS 1:100,000-scale Digital Line Graph (DGL) data.
Suggested Citation
Stalk, C.S., Fredericks, J.F., Locker, S.D., and Carlson, C.S., 2018, Multibeam bathymetry data collected in 2016 from Grand Bay Alabama/Mississippi (ver. 2.0, July 2020): U.S. Geological Survey data release, https://doi.org/10.5066/F7MC8Z9N.
First posted May 4, 2018
Revised July 16, 2020