shatt: 40 meter ESRI binary grid of swath bathymetry of inner continental shelf south of Cape Hatteras, NC to Cape Lookout, NC (UTM Zone 18N, WGS84)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2013
Title:
shatt: 40 meter ESRI binary grid of swath bathymetry of inner continental shelf south of Cape Hatteras, NC to Cape Lookout, NC (UTM Zone 18N, WGS84)
Edition: 1.0
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2011-1015
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage:
<https://pubs.usgs.gov/of/2011/1015/data/bathymetry/innershelf/shatt.zip>
Online_Linkage: <https://pubs.usgs.gov/of/2011/1015/data_catalog.html>
Larger_Work_Citation:
Citation_Information:
Originator: E.R. Thieler
Originator: D.S. Foster
Originator: D.M. Mallinson
Originator: E.A. Himmelstoss
Originator: J.E. McNinch
Originator: J.H. List
Originator: E.S. Hammar-Klose
Publication_Date: 2013
Title:
Quaternary Geophysical Framework of the Northeastern North Carolina Coastal System
Edition: 1
Series_Information:
Series_Name: Open File Report
Issue_Identification: 2011-1015
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: <https://pubs.usgs.gov/of/2011/1015/>
Description:
Abstract:
The northeastern North Carolina coastal system, from False Cape, Virginia, to Cape Lookout, North Carolina, has been studied by a cooperative research program that mapped the Quaternary geologic framework of the estuaries, barrier islands, and inner continental shelf. This information provides a basis to understand the linkage between geologic framework, physical processes, and coastal evolution at time scales from storm events to millennia. The study area attracts significant tourism to its parks and beaches, contains a number of coastal communities, and supports a local fishing industry, all of which are impacted by coastal change. Knowledge derived from this research program can be used to mitigate hazards and facilitate effective management of this dynamic coastal system.
This regional mapping project produced spatial datasets of high-resolution geophysical (bathymetry, backscatter intensity, and seismic reflection) and sedimentary (core and grab-sample) data. The high-resolution geophysical data were collected during numerous surveys within the back-barrier estuarine system, along the barrier island complex, in the nearshore, and along the inner continental shelf. Sediment cores were taken on the mainland and along the barrier islands, and both cores and grab samples were taken on the inner shelf. Data collection was a collaborative effort between the U.S. Geological Survey (USGS) and several other institutions including East Carolina University (ECU), the North Carolina Geological Survey, and the Virginia Institute of Marine Science (VIMS).
The high-resolution geophysical data of the inner continental shelf were collected during six separate surveys conducted between 1999 and 2004 (four USGS surveys north of Cape Hatteras: 1999-045-FA, 2001-005-FA, 2002-012-FA, 2002-013-FA, and two USGS surveys south of Cape Hatteras: 2003-003-FA and 2004-003-FA) and cover more than 2600 square kilometers of the inner shelf. Single-beam bathymetry data were collected north of Cape Hatteras in 1999 using a Furuno fathometer. Swath bathymetry data were collected on all other inner shelf surveys using a SEA, Ltd. SwathPLUS 234-kHz bathymetric sonar. Chirp seismic data as well as sidescan-sonar data were collected with a Teledyne Benthos (Datasonics) SIS-1000 north of Cape Hatteras along with boomer seismic reflection data (cruises 1999-045-FA, 2001-005-FA, 2002-012-FA and 2002-013-FA). An Edgetech 512i was used to collect chirp seismic data south of Cape Hatteras (cruises 2003-003-FA and 2004-003-FA) along with a Klein 3000 sidescan-sonar system. Sediment samples were collected with a Van Veen grab sampler during four of the USGS surveys (1999-045-FA, 2001-005-FA, 2002-013-FA, and 2004-003-FA). Additional sediment core data along the inner shelf are provided from previously published studies.
A cooperative study, between the North Carolina Geological Survey and the Minerals Management Service (MMS cores), collected vibracores along the inner continental shelf offshore of Nags Head, Kill Devils Hills and Kitty Hawk, North Carolina in 1996. The U.S. Army Corps of Engineers collected vibracores along the inner shelf offshore of Dare County in August 1995 (NDC cores) and July-August 1995 (SNL cores). These cores are curated by the North Carolina Geological Survey and were used as part of the ground validation process in this study.
Nearshore geophysical and core data were collected by the Virginia Institute of Marine Science. The nearshore is defined here as the region between the 10-m isobath and the shoreline. High-resolution bathymetry, backscatter intensity, and chirp seismic data were collected between June 2002 and May 2004. Vibracore samples were collected in May and July 2005.
Shallow subsurface geophysical data were acquired along the Outer Banks barrier islands using a ground-penetrating radar (GPR) system. Data were collected by East Carolina University from 2002 to 2005. Rotasonic cores (OBX cores) from five drilling operations were collected from 2002 to 2006 by the North Carolina Geological Survey as part of the cooperative study with the USGS. These cores are distributed throughout the Outer Banks as well as the mainland.
The USGS collected seismic data for the Quaternary section within the Albemarle-Pamlico estuarine system between 2001 and 2004 during six surveys (2001-013-FA, 2002-015-FA, 2003-005-FA , 2003-042-FA, 2004-005-FA, and 2004-006-FA). These surveys used Geopulse Boomer and Knudsen Engineering Limited (KEL) 320BR Chirp systems, except cruise 2003-042-FA, which used an Edgetech 424 Chirp and a boomer system. The study area includes Albemarle Sound and selected tributary estuaries such as the South, Pungo, Alligator, and Pasquotank Rivers; Pamlico Sound and trunk estuaries including the Neuse and Pamlico Rivers; and back-barrier sounds including Currituck, Croatan, Roanoke, Core, and Bogue.
Purpose:
Swath bathymetric data were collected along with sidescan-sonar, boomer and chirp sub-bottom geophysical data along the inner continental shelf study area. The swath bathymetric data are used to define the regional seabed morphology within the study region. These data will augment the sidescan-sonar and chirp sub-bottom data.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20030617
Ending_Date: 20040709
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -76.571668
East_Bounding_Coordinate: -75.474071
North_Bounding_Coordinate: 35.251149
South_Bounding_Coordinate: 34.493704
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: bathymetry
Theme_Keyword: swath bathymetry
Theme_Keyword: interferometry
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Woods Hole Coastal and Marine Science Center
Theme_Keyword: WHCMSC
Theme_Keyword: Gridded Raster Dataset
Theme_Keyword: ESRI binary grid
Theme_Keyword: field activity serial number 2003-003-FA
Theme_Keyword: field activity serial number 2004-003-FA
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: oceans and estuaries
Theme_Keyword: oceans and coastal
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: geoscientificInformation
Theme_Keyword: elevation
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: Corolla
Place_Keyword: Duck
Place_Keyword: Kill Devil Hills
Place_Keyword: Nags Head
Place_Keyword: Oregon Inlet
Place_Keyword: Rodanthe
Place_Keyword: Salvo
Place_Keyword: Avon
Place_Keyword: North Carolina
Place_Keyword: NC
Place_Keyword: Outer Banks
Place_Keyword: Oregon Inlet
Place_Keyword: Cape Hatteras
Place_Keyword: Cape Hatteras National Seashore
Place_Keyword: Wright Brothers National Memorial
Place_Keyword: United States
Place_Keyword: North America
Place_Keyword: Atlantic Ocean
Access_Constraints: None
Use_Constraints:
These data are not to be used for navigation purposes. Mariners should refer to the appropriate nautical chart. Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: E. Robert Thieler
Contact_Organization: U.S. Geological Survey
Contact_Position: Research Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2350
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: rthieler@usgs.gov
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.1850
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
These data were acquired during two surveys (2003-003-FA and 2004-003) with a SEA Ltd. SwathPlus bathymetric sonar.
Logical_Consistency_Report:
This grid represents interpolated data; processed to account for gaps that occurred along-track and between adjacent lines.
Completeness_Report:
All quality shore-parallel bathymetric data that were collected within inner continental shelf survey area south of Cape Hatteras to Cape Lookout, NC were incorporated in this grid. Soundings from the USGS surveys were processed and edited using the University of New Brunswick's Ocean Mapping Group (OMG) SwathEd multibeam processing software. Tielines (generally shore perpendicular) were not used in grid generation but used to verify tide corrections during post-processing.
Trackline spacing was 300 meters resulting in roughly 30 - 40% coverage with the SwathPlus bathymetric sonar. Thus, there are data gaps between tracklines. The data were interpolated to fill areas of NODATA and generate a continuous bathymetric surface.
Only the subset of bathymetry data collected south of Cape Hatteras has been included in this spatial dataset. Additional bathymetry data collected north of Cape Hatteras are included in a separate file available from: <https://pubs.usgs.gov/of/2011/1015/data/bathymetry/innershelf/nhatt.zip>.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
All navigation data were acquired using the Differential Global Positioning Systems (DGPS). The transducers were mounted on a rigid pole along the starboard side of the survey ship. Offset between the sidemount and the GPS antenna were accounted for. The horizontal positional uncertainty is estimated to be 1-3 meters (<http://www.navcen.uscg.gov>).
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Ship motion was recorded with a TSS DMS 2-05 Attitude Sensor, mounted on a head directly above the SwathPlus transducers. Navigation was recorded using Differential Global Positioning System (DGPS). Vertical accuracy is affected by the accuracy of both the navigation system and tidal measurements. DGPS vertical accuracy is assumed to be 0.2 meters. The data have been corrected for ship motion (roll, pitch, heave, and yaw). Tidal elevations were derived from the ADCIRC circulation model and referenced to Mean Sea Level. Changes in vessel draft due to fuel and water usage were not considered.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20030617
Ending_Date: 20030701
Source_Currentness_Reference: ground condition
Source_Contribution:
Data were collected with a swath bathymetry system mounted to the side of the research vessel. Sound velocity measurements were acquired throughout the survey area to model the sound velocity structure of the water column and minimize refraction artifacts. Motion of the vessel (heave, pitch, roll) was recorded with a TSS DMS 2-05 motion sensor mounted directly above the SwathPlus transducers. DGPS navigation was used for vertical and horizontal positioning.
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20040616
Ending_Date: 20040709
Source_Currentness_Reference: ground condition
Source_Contribution:
Data were collected with a swath bathymetry system mounted to the side of the research vessel. Sound velocity measurements were acquired throughout the survey area to model the sound velocity structure of the water column and minimize refraction artifacts. Motion of the vessel (heave, pitch, roll) was recorded with a TSS DMS 2-05 motion sensor mounted directly above the SwathPlus transducers. DGPS navigation was used for vertical and horizontal positioning.
Process_Step:
Process_Description:
Bathymetric data were corrected for variations in the speed of sound throughout the water column; sound velocity profiles were acquired throughout the survey area using an Applied MicroSystems SVPlus Sound Velocimeter. These data were downloaded and reformatted to the required format needed for use within University of New Brunswick's Ocean Mapping Group (OMG) SwathEd multibeam processing software. The raw SwathPlus data were "unraveled" and reformatted into the OMG format. This process creates several files on disk: 1) bathymetric soundings, 2) raw backscatter, 3) navigation, and 4) parameter files describing the configuration of the system (i.e. offsets between motion reference unit and GPS antenna, etc). This process also incorporates the sound velocity profiles in order to properly trace the travel path of the acoustic rays. This process step and all subsequent process steps were performed by Erika Hammar-Klose.
Process_Date: 2004
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Erika Hammar-Klose (performed process); Jane Denny (contact)
Contact_Organization: USGS
Contact_Position: Geologist
Contact_Address:
Address_Type: physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Country: USA
Contact_Voice_Telephone: J.Denny 508-548-8700 x2311
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: jdenny@usgs.gov
Process_Step:
Process_Description:
The OMG formatted bathymetric data were then graphically edited using the SwathEd multibeam processing software. This enabled editing on a "ping-by-ping" basis, both in the across- and along-track dimension. Spurious or erroneous data were removed. The navigation data were also graphically examined for each line of data.
Process_Date: 2004
Process_Step:
Process_Description:
Navigation data output during the unravel were reformatted for entry into MATLAB. The time of day and position were used to extract the tidal elevation from within the ADCIRC circulation model. The ADCIRC circulation model is referenced to Mean Sea Level. The tidal elevations were then written to an ASCII file and reformatted to OMG format for use within SwathEd. The tidal data were then written into the headers of the OMG formatted files, using the 'mergeTide' command. (an example of SwathEd Commands:
binTide -year 2002 adcirc_ascii.txt tide.bin mergeTide -tide tide.bin *.merged
)
Process_Date: 2004
Process_Step:
Process_Description:
SwathEd Software was used to generate a blank grid at a 20m/pixel resolution into which the bathymetric data were written. make_blank areanumber_20m
SwathEd software was then used to grid the bathymetric data utilizing the 'weigh_grid' command. The tidal elevations stored in the file headers are used by default during the gridding routine.
weigh_grid -omg -butter -max_incidence 60 -maxdep -55 -mindep -4 -power 2 -cutoff 20 -lambda 10 areanumber_20m *.merged
Process_Date: 2004
Process_Step:
Process_Description:
The 20 meter gridded data were then viewed using the SwathEd Jview command. The PatchTool was used to assess the roll misalignment of the data; slight roll misalignment artifacts were visible in the gridded data. After the needed adjustments were recorded, the configuration and navigation were remerged with the OMG bathymetric data using the mergeNav command. (mergeNav -use_params 0 -nav *.nav -swath *.merged)
The remerged data were regridded for a second round of QC.
Process_Date: 2004
Process_Step:
Process_Description:
The bathymetric data to this point have been edited, checked for navigation errors and corrected for tides (relative to MSL). Sound velocity corrections have been applied, and the roll misalignment was rectified. The 20 meter gridded data were exported as xyz ASCII file using the SwathEd command 'r4toASCII'.
(r4toASCII areanumber_20m areanumber_20m.xyz)
Process_Date: 2004
Process_Step:
Process_Description:
The 20 meter xyz data were imported into a GRASS database as a sites file. Command s.in.ascii input=areanumber_20m.xyz sites=areanumber_20m fs=. This sites file was interpolated at 40 meters using a regularized spline with tension gridding technique. s.surf.rst input=areanumber_20m elev=areanumber_40m dmin=20 tension=200 smooth=40 npmin=200 theta=45 scalex=40 The interpolated raster file was exported as an ASCII raster file. r.out.arc input=areanumber_40m output=areanumber_40m.asc
Process_Date: 2004
Process_Step:
Process_Description:
Each area's .asc file was converted into an ESRI Grid using the ASCII to Raster utility in ArcToolbox (v9.1) under Conversion Tools > To Raster > ASCII to Raster.
Process_Date: 2004
Process_Step:
Process_Description:
The individual grids for areas 11 through 16 (surveys from 2003 and 2004) were combined in GRASS using the "merge" command and smoothed with neighborhood statistics (mean, circle, 5 cells).
Process_Date: 20050329
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 4042
Column_Count: 1225
Vertical_Count: 1
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -75.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 40.000000
Ordinate_Resolution: 40.000000
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: Mean Sea Level (MSL)
Depth_Distance_Units: meters
Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: E. Robert Thieler
Contact_Organization: U.S. Geological Survey
Contact_Position: Research Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2350
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: rthieler@usgs.gov
Resource_Description: Downloadable Data
Distribution_Liability:
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: WinZip
Format_Version_Number: 9.0
Format_Information_Content:
This WinZip file contains the ESRI 32-bit floating point GRID format raster, accessory info files and associated metadata for the inner shelf bathymetry south of Cape Hatteras, NC.
File_Decompression_Technique: Use WinZip or pkUnzip
Transfer_Size: 2.6 MB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<https://pubs.usgs.gov/of/2011/1015/data/bathymetry/innershelf/shatt.zip>
Network_Resource_Name: <https://pubs.usgs.gov/of/2011/1015/data_catalog.html>
Access_Instructions: Data are downloadable via the World Wide Web
Fees: None
Technical_Prerequisites:
These data are available in Environmental Systems Research Institute (ESRI) GRID format. The user must have software capable of importing and processing the data file.
Metadata_Reference_Information:
Metadata_Date: 20110107
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Emily Himmelstoss
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2262
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: ehimmelstoss@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.6 on Mon Jun 17 11:42:28 2013