Noreen A. Buster
Owen T. Brenner
James G. Flocks
20171121
Interpolated digital elevation model (DEM) of the nearshore around Ship, Horn, and Petit Bois Islands, Mississippi: 2016
raster digital data
U.S. Geological Survey Data Release
doi:10.5066/F7028QFV
St. Petersburg, FL
U.S. Geological Survey
https://doi.org/10.5066/F7028QFV
To characterize coastal change, historical maps and complementary records were compiled including: topographic sheets (T-sheets), hydrographic sheets (H-sheets, smooth sheets), shorelines, and bathymetric soundings surrounding the Mississippi (MS) barrier islands over several time periods (1916-1920, 2008-2009 and 2016). One goal of this work was to create a time-series of bathymetric change maps around the islands. Datasets include 1916 through 1920 soundings collected by the United States Coast and Geodetic Survey as downloaded H-sheets and some digitized soundings from the National Oceanic and Atmospheric Administration (NOAA), 2008 to 2009 soundings collected by the United States Geological Survey St. Petersburg and Woods Hole Coastal and Marine Science Center (USGS SPCMSC and WHCMSC, respectively), and 2016 soundings collected by the USGS SPCMSC in the nearshore environment of Ship, Horn, and Petit Bois Islands. This USGS data release includes three digital elevation models (DEMs) for 1916 to 1920, 2008 to 2009, and 2016; however, this metadata file pertains to the 2016 DEM (2016_MS_NAD83NAVD88g12B_50m.tif). This work was completed in cooperation with the United States Army Corps of Engineers (Mobile, Alabama) and the National Park Service as part of the Mississippi Coastal Improvements Program (MsCIP).
The purpose of this effort was to create bathymetric grids and bathymetric change maps around the MS barrier islands to broadly characterize subaqueous morphologic change both spatially and temporally.
Elevation XYZ data used to create the 1916 to 1920 and 2008 to 2009 DEMs are included in this USGS data release; 2016 XYZ data can be downloaded from DeWitt and others, 2017. The 1916 to 2009 elevation (z) values were adjusted to account for sea-level rise, using the NOAA tide gauge at Pensacola, FL. For further information on XYZ processing, refer to the accompanying elevation point metadata and Dewitt and others (2017). Within ArcGIS 10.4.1, XYZ soundings for 1916-1920, 2008-2009, and 2016 were used to create Triangular Irregular Network (TIN) surfaces, individual TIN surfaces were later utilized to create a time-series of 50-m bathymetric rasters. All spatial files provided in this data release are referenced to the Universal Transverse Mercator (UTM) North American Datum (NAD83) horizontal datum and North American Vertical Datum of 1988 (NAVD88) GEOID12B.
20160713
20160719
ground condition
None planned
-89.003338
-88.499847
30.266217
30.187794
USGS Metadata Identifier
USGS:85d343bc-6eff-4de5-b202-c8d55ddb9ee4
ISO 19115 Topic Category
oceans
elevation
location
geoscientificInformation
imageryBaseMapsEarthCover
USGS Thesaurus
marine geology
geophysics
bathymetry
digital elevation models
ocean characteristics
ocean processes
None
soundings
hydrography
geophysical
seafloor mapping
historical
NOAA
National Oceanic and Atmospheric Administration
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
St. Petersburg Coastal and Marine Science Center
SPCMSC
coastal location
Geographic Names Information System (GNIS)
Mississippi
Alabama
Ship Island
Horn Island
Petit Bois Island
Dauphin Island
Mississippi Sound
Oregon Geospatial Enterprise Office (GEO) Stratum Keyword
sea surface
epipelagic
None
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.
Noreen A. Buster
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
nbuster@usgs.gov
U.S. Geological Survey, Coastal and Marine Geology Program, St. Petersburg Coastal and Marine Science Center
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.4.1
Noreen A. Buster
Robert A. Morton
20110404
Historical Bathymetry and Bathymetric Change in the Mississippi-Alabama Coastal Region, 1847-2009
U.S. Geological Survey Scientific Investigations Map
SIM 3154
St. Petersburg, FL
St. Petersburg Coastal and Marine Science Center
https://pubs.usgs.gov/sim/3154/
Nancy T. DeWitt
James G. Flocks
Elizabeth A. Pendleton
Mark E. Hansen
B.J. Reynolds
Kyle W. Kelso
Dana S. Wiese
Charles R. Worley
2012
Archive of single beam and swath bathymetry data collected nearshore of the Gulf Islands National Seashore, Mississippi, from West Ship Island, Mississippi, to Dauphin Island, Alabama: Methods and data report for USGS Cruises 08CCT01 and 08CCT02, July 2008, and 09CCT03 and 09CCT04, June 2009
U.S. Geological Survey Data Series
DS 675
St. Petersburg, FL
St. Petersburg Coastal and Marine Science Center
https://pubs.usgs.gov/ds/675/
Nancy T. DeWitt
Chelsea A. Stalk
Jake J. Fredericks
James G. Flocks
Kyle W. Kelso
Andrew S. Farmer
Thomas M. Tuten
Noreen A. Buster
2017
Coastal bathymetry data collected in 2016 nearshore from West Ship Island to Horn Island, Gulf Islands National Seashore, Mississippi
U.S. Geological Survey Data Release
doi:10.5066/F7B8571Q
St. Petersburg, FL
St. Petersburg Coastal and Marine Science Center
https://doi.org/10.5066/F7B8571Q
Kathryn M. Weber
Jeffrey H. List
Karen L.M. Morgan
2005
An Operational Mean High Water Datum for Determination of Shoreline Position from Topographic Lidar Data
U.S. Geological Survey Open-File Report
OFR 2005-1027
Woods Hole, MA
Woods Hole Coastal and Marine Science Center
https://pubs.usgs.gov/of/2005/1027/
Kristi K. Guy
2015
Barrier Island Shorelines Extracted from Landsat Imagery
U.S. Geological Survey Open-File Report
OFR 2015-1179
Woods Hole, MA
Woods Hole Coastal and Marine Science Center
https://pubs.usgs.gov/of/2015/1179/
The accuracy of the data was determined during data collection. These datasets are from individual research cruises and are 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.
For the interferometric swath bathymetry, (USGS FAN 2016-347-FA, SubFAN 16BIM04), offsets between the sonar head and the DGPS antennas were measured and entered into the CodaOctopus F190R+ internal setup program. The DGPS correction was obtained from Marinestar High-precision (HP) differential global navigation satellite system, a satellite positioning service, from Fugro, Incorporated. This signal was received through the Coda Octopus F190R+ primary GPS antenna. These bathymetric data have not been independently verified for accuracy. The DGPS [default settings] collected coordinate data referenced to the World Geodetic System of 1984 (WGS84) (G1762), which is equivalent at the centimeter level to the International Terrestrial Reference Frame of 2008 (ITRF08).
For the single beam survey (USGS FAN 2016-347-FA, SubFANs 16BIM05 and 16BIM06), offsets between the single beam transducers, the Ashtech antenna reference point (ARP), and the vessel motion units were measured on the roving vessels. All pertinent measurements were accounted for in the DGPS post processing software packages (National Geodetic Survey On-Line Positioning User Service, OPUS, and Waypoint Product Group GrafNav, version 8.6).
This DEM file represents the post-processed bathymetric data collected during USGS FAN 2016-347FA in the nearshore waters surrounding Ship and Horn Islands, Gulf Islands National Seashore, Mississippi (GUIS). Refer to Dewitt and others (2017) for field logs, vessel platform descriptions, and other survey information.
The data used to create the DEM are complete post-processed XYZ bathymetric data points from acoustic interferometric swath and single beam data collected in July 2016 from the nearshore waters surrounding Ship and Horn Islands, GUIS, Mississippi.
For the IFB: The navigation information was recorded in real-time kinematic mode via the Coda Octopus F190R+ Precision Attitude and Positioning System. Differential GPS correction was obtained through the Marinestar HP broadcast subscription from Fugro, Incorporated. The manufacturer's stated horizontal accuracy is 10 centimeters (cm) 95% of the time. The trackline position data were recorded using HYPACK version 16.1.1.0 hydrographic acquisition and processing software.
For the SBB: All static GPS base station sessions were run through the On-Line Positioning User Service (OPUS) maintained by the National Oceanic and Atmospheric Administration (NOAA) and the National Geodetic Survey (NGS). The base location results from OPUS were entered into a spreadsheet to compute one final coordinate and error analysis for that base location. Using the OPUS values for each day, and the total time that data were collected each day, the average daily weighted value of occupation time was calculated; longer occupation times held more value than shorter times. The final value for latitude, longitude, and ellipsoid was the weighted average of all the GPS sessions processed with OPUS. This value was entered in GrafNav version 8.6 as the base station coordinates. Error was calculated using daily outputs from OPUS and was calculated as the absolute value of the final value minus the daily value. The maximum horizontal error of the base station coordinates used for post-processing the single beam bathymetry was 0.00026 decimal seconds latitude and 0.00049 decimal seconds longitude for USACE benchmark 202Q, 0.00038 decimal seconds latitude and 0.00033 decimal seconds longitude for SPCMSC benchmark WHRN. The published coordinates were used for the Ship Island benchmark PID BBCL83(4756 F 2011), and the reported error is 0.013 meters latitude and 0.012 longitude.
0.00038
The maximum error for base stations 202Q, WHRN, and BBCL83 in latitude decimal seconds
0.00049
The maximum error for base stations 202Q, WHRN, and BBCL83 in longitude decimal seconds
For the IFB: The manufacturer's stated vertical accuracy of Marinestar GPS subscription is 15 cm, 95% of the time. The Coda Octopus F190R+ inertial measurement unit (IMU), which integrates the Marinestar position with motion, measures vessel velocity (+/- 0.014 meters/second [m/s]), roll and pitch (less than 0.025 degrees), heading (1 m baseline 0.1 degrees), and heave (5 cm per meter (m) of depth). The vertical accuracy for the SWATHplus-H system varies with depth and across track range.
The IFB data was transformed three times using VDatum version 3.6. The vertical transformation error reported by VDatum are the following: 1) Transformation from ITRF08 to ITRF00 (equivalent to at the centimeter level WGS84_G1150) is 0.000 m or 0.000 cm for the vertical area named CONUS (Conterminous U.S.). The additional, non-VDatum, reference located at the following link lists transformation from ITRF08 to ITRF00 as -0.01050 m or -1.050 cm (https://confluence.qps.nl/download/attachments/29856813/ITRF_Transformation_Parameters.xlsx); 2) Transformation from ITRF00 to NAD83, NAVD88 with respect to GEOID12B is 0.0762 m or 7.62 cm for the vertical area named GEOID12B, and 3) Transformation from NAD83, NAVD88 with respect to GEOID12B to NAD83, MLLW is 0.163 m or 16.30 cm for the vertical area named LAmobile02-8301.
For the SBB: All static base station sessions for 202Q and WHRN were processed through On-Line Positioning User Service (OPUS) maintained by the National Oceanic and Atmospheric Administration (NOAA) and the National Geodetic Survey (NGS). The base location results from OPUS 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 position minus the session position value. SPCMSC standards define the maximum acceptable vertical error for any individual base station GPS session as less than or equal to three times the standard deviation of the ellipsoid height; any occupations exceeding this error are removed and the base station coordinates are recalculated. For 202Q base location, the standard deviation of the ellipsoid height was 0.010 m and the maximum difference from the average ellipsoid for any GPS session was +/- 0.023 m. For WHRN base location, the standard deviation of the ellipsoid height was 0.002 m and the maximum difference from the average ellipsoid for any GPS session was +/- 0.022 m. For 4756 F 2011 base location only one OPUS session was run so the published coordinates were used and reported a vertical error of +/- 0.017 m.
The SBB data was transformed from ITRF00 to NAD83, NAVD88 with respect to GEOID12B using VDatum version 3.6. The vertical transformation error reported by VDatum is 0.0762 m or 7.62cm for the vertical area named GEOID12B.
Using Esri ArcGIS 10.4.1, 2016 SBB and IFB XYZ point data (Dewitt and others, 2017) were used to create a TIN surface using the 'Create TIN' tool within the 3D Analyst toolbox. The subaerial extent (shoreline file) of Ship, Horn, and Petit Bois were assigned the regional operational mean high water (MHW) value of 0.23 m (Weber and others, 2005) by soft clipping the TIN to coincident island shoreline shapefile (2015_shoreline_ShipHorn.shp) modified from Guy, 2015 with the elevation value of 0.23 m (Weber and others, 2005). The TIN was also clipped to the outer spatial extent of reliable data coverage of the XYZ dataset.
201707
Noreen A. Buster
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
Geologist
mailing
600 4th Street South
St. Petersburg
FL
33701
USA
(727) 502-8000
nbuster@usgs.gov
Using Esri ArcGIS 10.4.1, The TIN dataset for 2016 was used to create gridded raster surfaces using the 'TIN to Raster' tool within the 3D Analyst toolbox. The raster was interpolated using the nearest neighbor algorithm with a 50 m cell size and the processing extent was a common 50-m snap raster (MS2016_snapraster_50m.tif which is included within this data release) used for the interpolation to ensure the pixel cell center locations of the resulting raster matched other DEM rasters in this data release, allowing for direct comparisons.
201707
Noreen A. Buster
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
Geologist
mailing
600 4th Street South
St. Petersburg
FL
33701
USA
(727) 502-8000
nbuster@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
Raster
Grid Cell
159
967
Universal Transverse Mercator
16
0.999600
-87.000000
0.000000
500000.000000
0.000000
row and column
50
50
meters
North American Datum 1983
Geodetic Reference System 80
6378137.000000
298.257222101
North American Vertical Datum 1988 (GEOID12B)
0.0001
meters
Attribute values
Noreen A. Buster
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
nbuster@usgs.gov
2016_MS_NAD83NAVD88g12B_50m.tif
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.
GeoTIFF
ZIP
0.276
https://coastal.er.usgs.gov/data-release/doi-F7028QFV/data/2016_MS_NAD83NAVD88g12B_50m.zip
None
20201013
Noreen A. Buster
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
Geologist
mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
(727) 502-8000
nbuster@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
none
unclassified
none