Julie C. Bernier
Kyle W. Kelso
Nancy T. DeWitt
20190913
Single-Beam Bathymetric Data Collected in 2004 from Madison Bay, Louisiana
Tabular digital data, vector digital data
U.S. Geological Survey Data Release
doi:10.5066/P9RIB5GC
St. Petersburg, FL
U.S. Geological Survey
https://doi.org/10.5066/P9RIB5GC
Data release doi:10.5066/P9RIB5GC associated with this metadata record serves as an archive of single-beam bathymetric (SBB) data collected in July 2004 (Madison Bay) and August 2008 (Bully Camp, Point au Chien, Caminada, Fourchon, and Leeville) at six study areas in the Mississippi River Delta Plain (MRDP), Louisiana. Data were collected from historically formed open-water bodies as part of the U.S. Geological Survey’s (USGS) Gulf Coast Subsidence project to provide more extensive spatial coverage than water depths collected only along coring transects in 2002, 2003, 2006, and 2007 (USGS Open-File Reports [OFR] 2005-1216 and 2009-1158). The bathymetric data were used to estimate magnitudes of one-dimensional (vertical) and three-dimensional (volume) accommodation that formed as a result of extensive historical wetland loss in Barataria and Terrebonne Basins in the MRDP. All bathymetric data are provided as x,y,z point data in the projected coordinate system North American Datum of 1983 (NAD83), Universal Transverse Mercator (UTM) Zone 15 North (15N) and all elevations are North American Vertical Datum of 1988 (NAVD88) orthometric heights, derived using the GEOID03 geoid model.
Dissemination of processed SBB bathymetric data collected from Madison Bay, Louisiana in July 2004 (USGS Field Activity Number [FAN] 2004-303-FA [alternate FAN 04SCC03]). The bathymetric data were used to estimate magnitudes of one-dimensional (vertical) and three-dimensional (volume) accommodation that formed as a result of extensive historical wetland loss at Madison Bay.
A limited number of water depths were collected along coring transects at nine study areas in 2002, 2003, 2006, and 2007 (USGS OFRs 2005-1216 and 2009-1158). In 2004 and 2008, SBB data were collected at the Madison Bay, Bully Camp, Point au Chien, Caminada, Fourchon, and Leeville study areas. SBB data were not collected at the Bay St. Elaine, Bayou Perot, DeLarge, or Ironton study areas.
As part of FAN 2004-303-FA, SBB data were also collected at Little Pass Timbalier and Pass Abel, Louisiana in collaboration with researchers from the University of New Orleans. Those data were collected as part of a different project and will be published separately.
These data are scientific in nature and are not to be used for navigation. Bathymetric grids interpolated from these point elevations should be used with caution and should use an appropriate grid cell size based on trackline spacing.
20040723
20040725
Ground condition
None planned
-90.61462
-90.54891
29.40500
29.33002
USGS Metadata Identifier
USGS:d85bb113-2abc-494d-981b-271a33283b87
ISO 19115 Topic Category
elevation
geoscientificInformation
inlandWaters
location
USGS Thesaurus
geology
geomorphology
bathymetry
GPS measurement
None
single-beam
elevation
differential Global Positioning System
DGPS
wetland loss
accommodation
delta plain
U.S. Geological Survey
USGS
Geographic Names Information System (GNIS)
Louisiana
None
Mississippi River Delta Plain
Barataria Basin
Terrebonne Basin
None
The U.S. Geological Survey requests that it be acknowledged as the originator of this dataset in any future products or research derived from these data.
U.S. Geological Survey
Julie C. Bernier
Geologist
Mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
727-502-8000
jbernier@usgs.gov
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3.1.4959
Morton, R.A.
Bernier, J.C.
Barras, J.A.
Ferina, N.F.
2005
Rapid subsidence and historical wetland loss in the Mississippi Delta Plain: likely causes and future implications
U.S. Geological Survey Open-File Report
2005-1216
https://pubs.usgs.gov/of/2005/1216/
Morton, R.A.
Bernier, J.C.
Kelos, K.W.
2009
Recent subsidence and erosion at diverse wetland sites in the southeastern Mississippi delta plain
U.S. Geological Survey Open-File Report
2009-1158
https://pubs.usgs.gov/of/2009/1158
The accuracy of the processed data is determined during data collection. Offsets between the single-beam transducer and the Geographic Positioning System (GPS) antenna reference point (ARP) were measured during the survey and accounted for in post-processing. Bar checks were performed as calibration efforts to account for any drift in the Marimatech Echosounder. Differential Global Positioning System (DGPS) coordinates were obtained using post-processing software packages (National Geodetic Survey [NGS] On-Line Positioning User Service [OPUS], Automated GIPSY, Scripps Coordinate Update Tool [SCOUT] and Waypoint Product Group GrafNav, version 7.01).
Bathymetric soundings were recorded using a Marimatech E-Sea 103 echosounder system in combination with a Teledyne Dynamic Motion Sensor (DMS-05). Position and elevation data were recorded using an Ashtech Z-Xtreme GPS receiver and choke-ring antenna. GPS data were recorded concurrently throughout the survey at a nearby base station (maximum baseline distance about 11.5 kilometers [km]) using a similar instrument combination. The final point (xyz) data are the result of merging the post-processed DGPS position data with the sounding data using the software package System for Accurate Nearshore Depth Surveying (SANDS), version 3.1.
Data release doi:10.5066/P9RIB5GC associated with this metadata record includes the processed SBB position and elevation data for 26,172 point locations collected from Madison Bay, Louisiana in July 2004 (USGS FAN 2004-303-FA).
All static base station sessions were processed through OPUS (https://www.ngs.noaa.gov/OPUS/), Automated GIPSY (https://apps.gdgps.net/index.php), and SCOUT (https://sopac-old.ucsd.edu/scout.shtml). The base-station solutions were entered into a spreadsheet to compute a final, time-weighted positional coordinate (latitude, longitude, and ellipsoid height). Base-station positional error was calculated as the absolute value of the final weighted solution minus the session position value. The maximum horizontal error of the base station coordinates used for post-processing was 0.00059 seconds latitude and 0.00080 seconds longitude.
All static base station sessions were processed through OPUS, Automated GIPSY, and SCOUT. The base-station solutions were entered into a spreadsheet to compute a final, time-weighted positional coordinate (latitude, longitude, and ellipsoid height). Base-station positional error for each GPS session was calculated as the absolute value of the final weighted solution minus the session position value. For this survey, the standard deviation of the base station ellipsoid height was 0.013 meters (m) and the maximum vertical error for the base station was +/- 0.033 m.
GPS Acquisition - Position and elevation data were recorded using an Ashtech Z-Xtreme GPS receiver, which recorded the 12-channel full-carrier-phase positioning signals (L1/L2) from satellites via a choke-ring antenna. GPS data were recorded concurrently throughout the survey at a nearby base station (maximum baseline distance about 11.5 km) using a similar instrument combination. The base receiver and the rover receiver recorded their positions concurrently at 1-second (s) recording intervals throughout the survey.
2004
U.S. Geological Survey
Nancy T. DeWitt
Geologist
Mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
727-502-8000
ndewitt@usgs.gov
SBB Acquisition - The single-beam bathymetric data were collected aboard the 22-foot Research Vessel (R/V) Streeterville. HYPACK, a marine surveying, positioning, and navigation software package, managed the planned-transect information and provided real-time navigation, steering, correction, data quality, and instrumentation-status information to the boat operator. Planned tracklines were spaced approximately 500 m apart. Boat motion was recorded at 50-millisecond (ms) intervals using a Teledyne DMS-05 motion sensor. Depth soundings were recorded at 50-ms intervals using a Marimatech E-SEA-103 echosounder system. Data from the GPS receiver, motion sensor, and fathometer were recorded in real time and merged into a single raw data file (.RAW) in HYPACK, with each device string referenced by a device identification code and time stamped to UTC.
2004
U.S. Geological Survey
Nancy T. DeWitt
Geologist
Mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
727-502-8000
ndewitt@usgs.gov
GPS Processing - The coordinate values of the GPS base stations are the time-weighted average of the post-processed session values. The base station coordinates were imported into GrafNav, version 7.01 (Waypoint Product Group) and the data from the rover GPS were post-processed to the concurrent base-station session data; baseline distances were less than 11.5 km. The DGPS data were processed in the North American Datum of 1983 (NAD83) geodetic datum.
2005
U.S. Geological Survey
Nancy T. DeWitt
Geologist
Mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
727-502-8000
ndewitt@usgs.gov
SBB Processing - The raw bathymetric data and processed DGPS positions were merged using the System for Accurate Nearshore Depth Surveying (SANDS), version 3.1. SANDS is a single-beam acoustic (sounding), GPS-based hydrographic processing software package developed by the USGS for shallow-water bathymetric mapping. The merged, geometrically corrected SBB data were exported as x,y,z point data in the NAD83 (x,y) and NAVD88 GEOID03 (z) datums.
2005
U.S. Geological Survey
Nancy T. DeWitt
Geologist
Mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
727-502-8000
ndewitt@usgs.gov
Quality Control and Quality Assurance (QA/QC) - The processed SBB point data were imported into Esri ArcGIS, visually inspected for outliers, and elevation differences at the intersection of crossing tracklines were calculated. Data along tracklines with crossing elevation differences greater than 10 centimeters (cm) were reviewed for processing errors and adjusted or removed from the final dataset.
2005
2004-303-FA_MadisonBay_NAD83_NAVD88_G03
U.S. Geological Survey
Nancy T. DeWitt
Geologist
Mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
727-502-8000
ndewitt@usgs.gov
Added keywords section with USGS persistent identifier as theme keyword.
20201013
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Vector
Point
26172
Universal Transverse Mercator
15
0.9996
-93.0
0.0
500000.0
0.0
coordinate pair
0.001
0.001
Meters
D North American 1983
GRS 1980
6378137.0
298.257222101
North American Vertical Datum of 1988
0.001
Meters
Attribute values
2004-303-FA_MadisonBay_NAD83_NAVD88_G03.csv
Comma-separated values text file containing the processed SBB x,y,z point data for the Madison Bay study area.
USGS
2004-303-FA_MadisonBay_NAD83_NAVD88_G03.shp
Esri shapefile containing the processed SBB x,y,z point data for the Madison Bay study area.
USGS
2004-303-FA_MadisonBay_NAD83_NAVD88_G03.kml
Keyhole Markup Language (KML) file containing the processed SBB x,y,z point data for the Madison Bay study area.
USGS
FID
Internal feature number
Esri
Sequential unique whole numbers that are automatically generated
Shape
Feature geometry
Esri
Geometry type defining the features
NAD83_X
X-coordinate (easting) of sample point, in meters (NAD83, UTM zone 15N)
USGS
731626.311
737839.885
Meters
0.001
NAD83_Y
Y-coordinate (northing) of sample point, in meters (NAD83, UTM zone 15N)
USGS
3247041.295
3255226.820
Meters
0.001
NAVD88G03
Elevation (orthometric height) of sample point, in meters (NAVD88, GEOID03)
USGS
-5.113
-0.445
Meters
0.001
RMS
Root mean square (RMS) error of sample point, in meters
SANDS
0.024
0.076
Meters
0.001
DataType
Bathymetric data collection type
USGS
SBB
single-beam bathymetry
USGS
HypackLine
Trackline number assigned by HYPACK during acquisition
HYPACK
Character string
Year
Year data were acquired, in YYYY format
USGS
2004
2004
DOY
Day-of-year (DOY) the data were acquired
USGS
205
206
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
Julie C. Bernier
Geologist
Mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
727-502-8000
jbernier@usgs.gov
Downloadable data
This publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
Compressed (zip) archive
2019
Multimedia presentation
This zip archive includes comma-separated values text files (.csv), GIS data files in Esri shapefile (.shp) and Keyhole Markup Language (KML) formats, and accompanying metadata for SBB data collected in 2004 from Madison Bay, Louisiana (USGS FAN 2004-303-FA).
Unzip
2.1
https://coastal.er.usgs.gov/data-release/doi-P9RIB5GC/data/2004-303-FA_SBB_xyz.zip
None, if obtained online
GIS files can be opened using the free ArcGIS Explorer or Google Earth GIS viewers.
20201013
U.S. Geological Survey
Julie C. Bernier
Geologist
Mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
727-502-8000
jbernier@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
None
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution.
None
Unclassified
None