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St. Petersburg Coastal and Marine Science Center

Data Release

Single-Beam Bathymetry Data Collected in 2015 Nearshore Dauphin Island, Alabama

By Nancy T. DeWitt,1 Chelsea A. Stalk,2 James G. Flocks,1 Julie C. Bernier,1 Kyle W. Kelso,1 Jake J. Fredericks,1 and Thomas Tuten2

1U.S. Geological Survey
2Cherokee Nation Technologies

Summary

Dauphin Island, Alabama is a barrier island located in the Northern Gulf of Mexico that supports local residences, tourism, commercial infrastructure, and the historical Fort Gaines. During the past decade, Dauphin Island has been impacted by several major hurricanes (Ivan, 2004; Katrina, 2005; Isaac, 2012). Storms, along with sea level rise, present a continued threat to island stability. State and federal managers are taking a scientific, investigative approach to identify the best options available to formulate and implement a long-term plan to properly restore Dauphin Island and provide resilience against future storms and sea-level rise. Island morphology, including current bathymetry and shoreline data, is one of several aspects being investigated and funded through a grant from the National Fish and Wildlife Foundation Gulf Environmental Benefit Fund. In 2015, the United States Geological Survey Saint Petersburg Coastal and Marine Science Center (USGS SPCMSC), in cooperation with the United States Army Corps of Engineers (USACE) and the state of Alabama, conducted bathymetric surveys of the nearshore waters surrounding Dauphin Island. This data release provides 1,165-line kilometers (km) of processed single-beam bathymetry (SBB) data collected by the USGS SPCMSC in August 2015 (Field Activity Number [FAN] 2015-326-FA). Data were acquired aboard four separate survey vessels; the RV Sallenger (subFAN, 15BIM10), the RV Jabba Jaw (subFAN, 15BIM11), the RV Shark (subFAN, 15BIM12), and the RV Chum (subFAN, 15BIM13). The data are provided in three datums: 1) the International Terrestrial Reference Frame of 2000 (ITRF00), ellipsoid height (-47.04 meters [m] to -29.36 m);  2) the North American Datum of 1983, realization of CORS96 (NAD83 [CORS96]) horizontal, and the North American Vertical Datum 1988 (NAVD88) vertical (-0.24 m to -17.33 m); and 3) the NAD83 (CORS96) horizontal, and Mean Lower Low Water (MLLW) vertical (-0.12 m to -17.93 m). Additional files include trackline shapefiles, digital and handwritten Field Activity Collection Systems (FACS) logs, a comprehensive 50-meter Digital Elevation Model (DEM), and formal Federal Geographic Data Committee (FGDC) metadata.

Data

File Name and Description Metadata (XML format) Metadata (text format) Download File
Dauphin_Island_2015_SBB_ITRF00_xyz.zip
The single-beam soundings (xyz) in ITRF00 and ellipsoid height.
Dauphin_Island_2015_SBB_
ITRF00_xyz_metadata.xml
Dauphin_Island_2015_SBB_
ITRF00_xyz_metadata.txt
Dauphin_Island_2015_SBB_
ITRF00_xyz.zip

(76 MB)
Dauphin_Island_2015_SBB_ITRF00_50_DEM.zip
Bathymetry DEM, 50-m cell size in ITRF00.
Same as above Same as above Dauphin_Island_2015_SBB_
ITRF00_50_DEM.zip

(0.16 MB)
Dauphin_Island_2015_SBB_ITRF00_tracklines.zip
Single-beam trackline shapefile in ITRF00.
Same as above Same as above Dauphin_Island_2015_SBB_
ITRF00_tracklines.zip

(51 MB)
Dauphin_Island_2015_SBB_ NAD83_NAVD88_GEOID12A _xyz.zip
The single-beam soundings (xyz) in NAD83 and NAVD88 (orthometric height) with respect to the GEOID12A model.
Dauphin_Island_2015_SBB_NAD83_NAVD88_
GEOID12A_MLLW_xyz_metadata.xml
Dauphin_Island_2015_SBB_NAD83_NAVD88_
GEOID12A_MLLW_xyz_metadata.txt
Dauphin_Island_2015_SBB_NAD83_
NAVD88_GEOID12A_xyz.zip

(93 MB)
Dauphin_Island_2015_SBB_NAD83_NAVD88_GEOID12A_50_DEM.zip
Bathymetry DEM, 50-m cell size, in NAD83 and NAVD88 with respect to the GEOID12A model.
Same as above Same as above Dauphin_Island_2015_SBB_NAD83_
NAVD88_GEOID12A_50_DEM.zip

(0.17 MB)
Dauphin_Island_2015_SBB_NAD83_tracklines.zip
Single-beam trackline shapefile in NAD83.
Same as above Same as above Dauphin_Island_2015_SBB_
NAD83_tracklines.zip

(53 MB)
Dauphin_Island_2015_SBB_NAD83_MLLW_xyz.zip
The single-beam soundings (xyz) in NAD83 MLLW.
Same as above Same as above Dauphin_Island_2015_SBB_
NAD83_MLLW_xyz.zip

(93 MB)
Dauphin_Island_2015_SBB_NAD83_MLLW_50_DEM.zip
Bathymetry DEM, 50-m cell size, in NAD83 and MLLW.
Same as above Same as above Dauphin_Island_2015_SBB_
NAD83_MLLW_50_DEM.zip

(.16 MB)
Supplemental Information
2015-326-FA_FACS.zip
Field Activity Collections System (FACS) for USGS FAN 2015-326-FA. Includes overview and crew logs.
Not applicable Not applicable 2015-326-FA_FACS.zip
(0.026 MB)
15BIM10_FACS_Operations.zip
FACS for USGS subFAN 15BIM10. Includes GPS equipment, vessel offsets, and handwritten operation notes.
Not applicable Not applicable 15BIM10_FACS_Operations.zip
(1.00 MB)
15BIM11_FACS_Operations.zip
FACS for USGS subFAN 15BIM11. Includes GPS equipment, vessel offsets, and handwritten operation notes.
Not applicable Not applicable 15BIM11_FACS_Operations.zip
(18.0 MB)
15BIM12_FACS_Operations.zip
FACS for USGS subFAN 15BIM12. Includes GPS equipment, vessel offsets, and handwritten operation notes.
Not applicable Not applicable 15BIM12_FACS_Operations.zip
(99.1 MB)
15BIM13_FACS_Operations.zip
FACS for USGS subFAN 15BIM13. Includes GPS equipment, vessel offsets, and handwritten operation notes.
Not applicable Not applicable 15BIM13_FACS_Operations.zip
(99.1 MB)

Map showing the 2015 single-beam bathymetry tracklines (red) nearshore Dauphin Island, Alabama
Figure 1. Map showing the 2015 single-beam bathymetry tracklines (red) nearshore Dauphin Island, Alabama. Base map is USGS 1:100,000-scale Digital Line Graph (DLG) data.

Suggested Citation

DeWitt, N.T., Stalk, C.A., Flocks, J.G., Bernier, J.C., Kelso, K.W., Fredericks, J.J., and Tuten, T., 2017, Single-beam bathymetry data collected in 2015 nearshore Dauphin Island, Alabama: U.S. Geological Survey data release, https://doi.org/10.5066/F7BZ648W.



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