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 2019 from Grand Bay and Point Aux Chenes Bay Alabama/Mississippi
By Chelsea A. Stalk, Jake J. Fredericks, Christopher G. Smith, and Kathryn E.L. Smith
Summary
The U.S Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) conducted an ellipsoidally referenced survey using a multibeam echosounder within Grand Bay and Point Aux Chenes Bay, Alabama/Mississippi May 7–10, 2019. The survey is a part of the Estuarine and Marsh Geology Research Project (EMRG) which focuses on evaluating the linkage between marsh shoreline metrics and marsh geology. To facilitate mapping of the eroding marsh edges at locations of interest around the bay, the multibeam echosounder (MBES) was horizontally tilted 62.5 degrees. Additional data were acquired utilizing a flat MBES configuration. This dataset includes the processed elevation point data (x,y,z) from both configurations, as derived from separate 1-meter bathymetric grids, in the native format of the World Geodetic System of 1984 (WGS84). The data were transformed horizontally into the North American Datum of 1983 (NAD83) and vertically to the North American Vertical Datum of 1988 (NAVD88), using the GEOID12A model, and these files are also provided. For further information regarding data collection and/or processing methods, please refer to the associated metadata.
Data
| File Name and Description | Metadata (XML format) | Metadata (text format) | Download File |
|---|---|---|---|
| Grand_Bay_2019_MBES_xyz.zip Processed elevation point data from both sensor configurations (xyz) as derived from a 1-meter grid provided in WGS84 and NAD83, NAVD88 GEOID 12A (.xyz) |
Grand_Bay_2019_MBES_ xyz_metadata.xml |
Grand_Bay_2019_MBES_ xyz_metadata.txt |
Grand_Bay_2019_MBES_xyz.zip (8.4 MB) |
Figure 1. Location map of areas surveyed as a part of the 2019 multibeam bathymetry survey within Grand Bay and Point Aux Chenes Bay, Alabama/Mississippi.
Suggested Citation
Stalk, C.A., Fredericks, J.J., Smith, C.G., and Smith, K.E.L., 2020, Multibeam bathymetry data collected in 2019 from Grand Bay and Point Aux Chenes Bay Alabama/Mississippi: U.S. Geological Survey data release, https://doi.org/10.5066/P9WYP8BW.