Chelsea A. Stalk
Jake J. Fredericks
Stanley D. Locker
Cody S. Carlson
20200716
Multibeam Bathymetry Data Collected in 2016 from Grand Bay Alabama/Mississippi: Unadjusted processed elevation point data (x,y,z)
tabular digital data
U.S. Geological Survey Data Release
doi:10.5066/F7MC8Z9N
St. Petersburg, FL
U.S. Geological Survey
https://doi.org/10.5066/F7MC8Z9N
A reconnaissance multibeam bathymetry survey was conducted by the U.S Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) in Grand Bay Alabama/Mississippi (AL/MS) on May 12, 2016 as an assessment of the shallow water capabilities of the Teledyne Reson SeaBat T50-P multibeam echosounder, and as an attempt to map the eroding marsh edges at locations of interest around the bay. This dataset, Grand_Bay_2016_MBB_Unadjusted_xyz.zip, includes the resulting [unadjusted] processed elevation point data (x,y,z), as derived from a half meter resolution surface. For this dataset, a static offset was not applied to vertically adjusted the data to match USGS bathymetry data previously acquired in 2015 (DeWitt and others, 2016).
The purpose of the survey was to assess the capabilities of the Teledyne Reson SeaBat T50-P multibeam echosounder and attempt to image eroding marsh edges at areas of interest within Grand AL/MS. In order to extend the horizontal coverage and esonify the shallow water marsh edges, the head of the system was tilted at an angle of 30 degrees to the port side of the vessel. Data were collected during USGS field activity number (FAN) 2016-331-FA aboard the R/V Jabba Jaw, a 22-foot (ft) fiberglass shallow draft center console catamaran. Additional survey and data details are available from the USGS Coastal and Marine Geoscience Data System (CMGDS) at, https://cmgds.marine.usgs.gov/fan_info.php?fan=2016-331-FA.
The processed sonar data are provided as American Standard Code for Information Interchange (ASCII) x,y,z point data files. These values are not the individual soundings but are the exported BASE (Bathymetry with Associated Statistical Error) surface at 0.5-meter (m) spatial distances with associated CUBE (Combined Uncertainty and Bathymetry Estimator) sample surface created from the edited soundings dataset using CARIS HIPS and SIPS version 10.2. These are considered interpolated samples in which one value represents all soundings within a 0.50-meter node, weighted by uncertainty and proximity, giving the final value as a data sample within the specific grid cell. The data were collected and processed in the World Geodetic System of 1984 (WGS84) reference frame. This dataset was subsequently transformed using National Oceanic and Atmospheric Administration (NOAA) VDatum version 3.7 transformation software (http://vdatum.noaa.gov/). The data were transformed from WGS84 (G1674) horizontally to the North American Datum of 1983 (NAD83 [2011]) and then vertically to the North American Vertical Datum of 1988 (NAVD88) relative to the GEOID model of 2012 version A (GEOID12A).
20160512
20160512
ground condition
None planned
-88.411770
-88.395593
30.384007
30.364026
USGS Metadata Identifier
USGS:03a84678-157f-43d3-8058-9734c5f96fa8
ISO 19115 Topic Category
oceans
elevation
location
geoscientificInformation
imageryBaseMapsEarthCover
USGS Thesaurus
marine geology
bathymetry
multibeam sonar
ocean characteristics
ocean processes
None
hydrography
geophysics
seafloor mapping
Teledyne Reson T50-P
Applanix POS MV Wavemaster II
U.S. Geological Survey
USGS
Sea level and Storm Impacts on Estuarine Environments and Shorelines
SSIEES
St. Petersburg Coastal and Marine Science Center
SPCMSC
Geographic Names Information System (GNIS)
Alabama
Mississippi
Grand Bay
Grand Bay National Wildlife Refuge
None
May 2016
None
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of these data in future products or derivative research.
Chelsea A. Stalk
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
(727)502-8000
cstalk@usgs.gov
U.S. Geological Survey, Sea-level and Storm Impacts on Estuarine Environments and Shorelines (SSIEES) program, St. Petersburg Coastal and Marine Science Center.
Microsoft Windows 7 Version 6.2 (Build 9200) Service Pack 1; Esri ArcGIS 10.3.1.4959
Nancy T. DeWitt
Chelsea A. Stalk
Christopher G. Smith
Stanley D. Locker
Jake J. Fredericks
Terrance A. McCloskey
Cathryn J. Wheaton
20161122
Single-Beam Bathymetry Data Collected in 2015 from Grand Bay, Mississippi/Alabama
multimedia presentation
U.S. Geological Survey Data Release
doi:10.5066/F7NP22M2
St. Petersburg, FL
U.S. Geological Survey
https://doi.org/10.5066/F7NP22M2
This dataset was from one research cruise and was therefore internally consistent. Methods were employed to maintain data collection consistency aboard the platform. During mobilization, each piece of equipment was isolated to obtain internal and external offset measurements with respect to the survey platform. All the critical measurements were recorded manually and digitally entered into their respective programs. The data have not been independently verified for accuracy.
This file represents the post-processed unadjusted bathymetric data (x,y,z) collected during a multibeam bathymetry survey.
These are complete post-processed unadjusted x,y,z bathymetric data points from acoustic multibeam data collected in Grand Bay Alabama/Mississippi, May 2016.
An Applanix POS MV Wavemaster II system was used to provide position and attitude data during data collection and accounted for vessel motion such as heave, pitch, and roll. Post-processed navigation data have a reported horizontal accuracy of 0.045 meters.
Vertical accuracy of the post-processed navigation data is reported as 0.018 m.
Acquisition: Multibeam data were acquired using a Teledyne Reson SeaBat T50-P multibeam echosounder mounted to the bow of the R/V Jabba Jaw, a 22-ft fiberglass shallow draft center console catamaran. An Applanix Pos MV Wavemaster II V5 Inertial Measurement Unit was mounted on top of the sonar bracket in the water and was used for positioning and attitude. Two Trimble 540AP GPS antennas were affixed to the top of the sonar mount pole. A functioning sound velocity sensor was not available for speed of sound readings at the head. A Sontek Castaway CTD was used for sound velocity profiles and speed of sound values. Hydrographic survey acquisition and processing software, HYPACK/HYSWEEP (version 2015) managed data inputs from sensors and produced two files (.RAW and .HSX). Data were collected in WGS84 (G1674).
20160512
Cody S. Carlson
Seafloor Systems Inc.
mailing and physical
4415 Commodity Way
SShingle Springs
CA
95682
USA
503-677-1019
cody@seafloorsystems.com
Processing: Positioning and attitude data were post-processed in Applanix POSPac MMS software version 8.0. Raw position files were imported into POSPac and processed with the single-base function utilizing Continuously Operating Reference Station (CORS) ALDI (https://www.ngs.noaa.gov/CORS/Sites/aldi.html). ALDI coordinates were verified using National Geodetic Survey (NGS) data sheets, the data were then processed using the Global Navigation Satellite System Inertial Processor function. Upon post-processing, a smoothed best estimate of trajectory (SBET) file was created and exported in WGS84 (G1674). Bathymetric data were post-processed using two separate hydrographic processing software systems. First, .HSX files were imported into HYPACK MBMAX64, version 2015, where sounding (x,y,z) position and motion data were corrected using the SBET file described above. Data were then cleaned using filters and manual editing. A sounding artifact near nadir was identified and manually removed. Data were then exported as a .HS2X file and imported into CARIS Hydrographic processing software version 10.2. Collected sound velocity profiles were applied to account for changes in the speed of sound within the water column during the survey. Refraction artifacts were present in the data and were resolved using the Refraction Editor. A roll calibration was performed, and data were examined and further cleaned using Subset Editor. A 0.50-m bathymetric CUBE surface was computed and the final surface was exported as an x,y,z ASCII file using the Base Surface to ASCII function.
20170425
Grand_Bay_2016_MBB_WGS84_0.5m_Unadjusted_xyz.txt
Chelsea A. Stalk
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
(727)502-8000
cstalk@usgs.gov
Datum Transformation: Final x,y,z data were converted using version 3.7 of NOAA’s VDatum software conversion tool (reported vertical transformation error is 5.4 centimeters) from the WGS84 G1674 realization to NAD83 (2011) with ellipsoid heights. In addition, the data were transformed horizontally from WGS84 to NAD83 and vertically to NAVD88, using the GEOID12A model (orthometric height).
20171222
Grand_Bay_2016_MBB_NAD83_0.5m_Unadjusted_xyz.txt, Grand_Bay_2016_MBB_NAD83_NAVD88_GEOID12A_0.5m_Unadjusted_xyz.txt
Chelsea A. Stalk
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
(727)502-8000
cstalk@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
Point_and_Vector_Object_Count 288248
Universal Transverse Mercator
16
0.999600
-87.0
0.0
500000.0
0.0
coordinate pair
0.6096
0.6096
meters
World Geodetic System of 1984
WGS_84
6378137.0
298.257223563
World Geodetic System of 1984
0.001
meters
Attribute values
Grand_Bay_2016_MBB_WGS84_0.5m_Unadjusted_xyz.txt
Comma separated text (.txt) file containing the processed 0.5-m resolution multibeam bathymetry x,y,z samples in the WGS84 G1674 realization (ellipsoid height). This file has not been vertically adjusted to match previously collected local bathymetry data provided in DeWitt and others (2016).
HYPACK
WGS84_X
WGS84 Universal Transverse Mercator (UTM) zone 16N X-coordinate (easting) of sample point, in meters.
HYPACK
364358.312
365886.001
0.001
WGS84_Y
WGS84 UTM zone 16N Y-coordinate (northing) of sample point, in meters.
HYPACK
3359968.214
3362164.130
0.001
Ellipsoid
WGS84 (ellipsoid height) of sample point, in meters.
HYPACK
-30.600
-27.980
0.001
DataType
MBB = Multibeam Bathymetry; USGS SPCMSC identifier of bathymetry data type.
USGS
Character string - MBB
Year
Year data were collected
USGS
2016
HypackLine
Line name assigned by HYPACK during acquisition.
HYPACK
Line number followed by segment number and Coordinated Universal Time (UTC) at start of line.
Site
Site identifier for data.
USGS
SITE_1, SITE_2, SITE_3
Grand_Bay_2016_MBB_NAD83_0.5m_Unadjusted_xyz.txt
Comma separated values text (.txt) file containing the processed 0.5-m resolution multibeam bathymetry x,y,z samples in NAD83 (2011). This file has not been vertically adjusted to match previously collected local bathymetry data provided in DeWitt and others (2016).
HYPACK; VDatum
NAD83_X
NAD83 UTM zone 16N X-coordinate (easting) of sample point, in meters.
HYPACK; VDatum
364359.093
365886.781
0.001
NAD83_Y
NAD83 UTM zone 16N Y-coordinate (northing) of sample point, in meters.
HYPACK; VDatum
3359967.619
3362163.534
0.001
NAD83_Ellipsoid
NAD83 (ellipsoid height) of sample point, in meters.
HYPACK; VDatum
-29.200
-26.580
0.001
DataType
MBB = Multibeam Bathymetry; USGS SPCMSC identifier of bathymetry data type.
USGS
Character string - MBB
Year
Year data were collected
USGS
2016
HypackLine
Line name assigned by HYPACK during acquisition.
HYPACK
Line number followed by segment number and UTC time at start of line.
Site
Site identifier for data.
USGS
SITE_1, SITE_2, SITE_3
Grand_Bay_2016_MBB_NAD83_NAVD88_GEIOID12A_0.5m_Unadjusted_xyz.txt
Comma separated values text (.txt) file containing the processed 0.5-m resolution multibeam bathymetry x,y,z samples in NAD83 (2011), NAVD88 using the GEOID12A model (orthometric height). This file has not been vertically adjusted to match previously collected local bathymetry data provided in DeWitt and others (2016).
HYPACK; VDatum
NAD83_X
NAD83 UTM zone 16N X-coordinate (easting) of sample point, in meters
HYPACK; VDatum
364359.093
365886.781
0.001
NAD83_Y
NAD83 UTM zone 16N Y-coordinate (northing) of sample point, in meters
HYPACK; VDatum
3359967.619
3362163.534
0.001
NAVD88_GEOID12A
NAVD88 (orthometric height) of sample point, in meters with respect to GEOID12A.
HYPACK; VDatum
-1.110
1.503
0.001
DataType
MBB = Multibeam Bathymetry; USGS SPCMSC identifier of bathymetry data type.
USGS
Character string - MBB
Year
Year data were collected
USGS
2016
HypackLine
Line name assigned by HYPACK during acquisition.
HYPACK
Line number followed by segment number and UTC time at start of line.
Site
Site identifier for data.
USGS
SITE_1, SITE_2, SITE_3
Chelsea A. Stalk
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
(727) 502-8114
cstalk@usgs.gov
Grand_Bay_2016_MBB_WGS84_0.5m_Unadjusted_xyz.txt, Grand_Bay_2016_MBB_NAD83_0.5m_Unadjusted_xyz.txt, Grand_Bay_2016_MBB_NAD83_NAVD88_GEOID12A_0.5m_Unadjusted_xyz.txt
Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), 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 constitute any such warranty. The USGS shall not be held liable for improper or incorrect use of the data described or contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
ASCII
ZIP
7.5
https://coastal.er.usgs.gov/data-release/doi-F7MC8Z9N/data/Grand_Bay_2016_MBB_Unadjusted_xyz.zip
None
20201013
Chelsea A. Stalk
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
Electronics Technician (Marine Instrumentation)
mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
(727) 502-8000
cstalk@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
none
unclassified
None