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FGDC Metadata

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Karynna Calderon

Originator: Arnell S. Forde

Originator: Shawn V. Dadisman

Originator: Dana S. Wiese

Originator: Daniel C. Phelps

Originator: U.S. Geological Survey

Originator: Florida Geological Survey

Publication_Date: 2012

Title:

Archive of Digital Boomer Subbottom Profile Data Collected in the Atlantic Ocean Offshore Northeast Florida During USGS Cruises 03FGS01 and 03FGS02 in September and October of 2003

Geospatial_Data_Presentation_Form: Tabular, vector, and raster digital data

Series_Information:

Series_Name: U.S. Geological Survey Data Series

Issue_Identification: 670

Publication_Information:

Publication_Place: St. Petersburg, FL

Publisher: U.S. Geological Survey

Online_Linkage: <https://pubs.usgs.gov/ds/670/>

Description:

Abstract:

In September and October of 2003, the U.S. Geological Survey (USGS), in cooperation with the Florida Geological Survey, conducted geophysical surveys of the Atlantic Ocean offshore northeast Florida from St. Augustine, Florida, to the Florida-Georgia border. This report serves as an archive of unprocessed digital boomer subbottom profile data, trackline maps, navigation files, Geographic Information System (GIS) information, Field Activity Collection System (FACS) logs, and formal Federal Geographic Data Committee (FGDC) metadata. Filtered and gained (a relative increase in signal amplitude) digital images of the seismic profiles are also provided.

Purpose:

To archive all digital boomer subbottom profile data collected during cruises 03FGS01 and 03FGS02 and associated files.

Supplemental_Information:

The USGS St. Petersburg Coastal and Marine Science Center (SPCMSC) in Florida assigns a unique identifier to each cruise or field activity. For example, 03FGS01 tells us the data were collected in 2003 as part of cooperative work with the Florida Geological Survey (FGS) and that the data were collected during the first field activity for that project in that calendar year. Refer to http://walrus.wr.usgs.gov/infobank/programs/html/definition/activity.html for a detailed description of the method used to assign the field activity ID. The naming convention used for each seismic line is as follows: yye##a, where 'yy' are the last two digits of the year in which the data were collected, 'e' is a 1-letter abbreviation for the equipment type (for example, b for boomer), '##' is a 2-digit number representing a specific track, and 'a' is a letter representing the section of a line if recording was prematurely terminated or rerun for quality or acquisition problems.

The boomer plate is an acoustic energy source that consists of capacitors charged to a high voltage and discharged through a transducer in the water. The transducer is towed on a sled floating on the water surface and when discharged emits a short acoustic pulse, or shot, that propagates through the water, sediment column, or rock beneath. The acoustic energy is reflected at density boundaries (such as the seafloor, sediment, or rock layers beneath the seafloor), detected by the hydrophones, and recorded by a PC-based seismic acquisition system. This process is repeated at timed intervals (for example, 0.5 seconds) and recorded for specific intervals of time (for example, 100 milliseconds). In this way, a two-dimensional (2-D) vertical profile of the shallow geologic structure beneath the ship track is produced.

For both cruises, a C-Products C-Boom power supply provided 100 -110 joules per shot. Reflected energy was received by a Benthos MESH streamer and recorded by Triton Elics International, Inc. (TEI) Delph Seismic acquisition software. The streamer contains 10 hydrophones evenly spaced every 12 inches. Refer to the handwritten FACS operation log included with this archive for diagrams and descriptions of acquisition geometry, which varied throughout the cruises. The sample frequency of the data is 20-24 kilohertz, the record length is 100 milliseconds, and the shot rate was every 0.5 seconds. Shot spacing was approximately every 1 meter.

The binary portion of the unprocessed seismic data are stored in SEG Y (rev. 0), integer, Motorola format, which is a standard digital format that can be read and manipulated by all seismic processing software packages (Barry and others, 1975), with the exception of the first 3,200 bytes of the card image header, which are stored in ASCII format instead of the standard EBCDIC format. The SEG Y formatted trace files have a .tra extension. Additional recording parameters for each trace file can also be found in the .par file associated with each .tra file. However, the .par and .pln files included here are needed only to process or display the data with TEI Delph Seismic software. The SEG Y files may be downloaded and processed with commercial or public domain software such as Seismic Unix (SU) (Cohen and Stockwell, 2005). Also provided are example SU scripts that allow the user to strip off navigation fixes from the SEG Y headers, along with a fix for every 500 shots, and produce a printable, gained GIF image of each profile. The printable profiles provided here are GIF images that were filtered and gained using SU software. Refer to the Software page for links to example SU processing scripts and USGS software for viewing the SEG Y files (Zihlman, 1992).

The SEG Y files are available on the DVD version of this report or on the Web, downloadable via the USGS Coastal and Marine Geoscience Data System (http://cmgds.marine.usgs.gov). The data is also available for viewing using GeoMapApp (http://www.geomapapp.org) and Virtual Ocean (http://www.virtualocean.org) multi-platform open source software.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20030922

Ending_Date: 20031022

Currentness_Reference: Data collection interval

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -81.382166

East_Bounding_Coordinate: -81.116332

North_Bounding_Coordinate: 30.709674

South_Bounding_Coordinate: 29.883766

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Geology

Theme_Keyword: Coastal Information

Theme_Keyword: Marine Subbottom Profile

Theme_Keyword: Boomer

Theme_Keyword: Society of Exploration Geophysicists

Theme_Keyword: SEG Y

Theme_Keyword: Florida Geological Survey

Theme_Keyword: 03FGS01

Theme_Keyword: 03FGS02

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Content Characterization

Place_Keyword: Atlantic Ocean

Place_Keyword: United States of America

Place_Keyword: Florida

Place_Keyword: Tolomato River

Place_Keyword: St. Augustine Inlet

Access_Constraints: None. These data are held in the public domain.

Use_Constraints:

The USGS and FGS request to be acknowledged as originators of the data in future products or derivative research.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Shawn Dadisman

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical

Address: 600 4th Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: (727) 803-8747 ext. 3029

Contact_Electronic_Mail_Address: sdadisman@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name: https://pubs.usgs.gov/ds/670/all.jpg

Browse_Graphic_File_Description:

Trackline map of digital boomer subbottom profile data collected during USGS cruises 03FGS01 and 03FGS02. This map was created at a scale of 1:750,000. Refer to the Lineage section below for the trackline map creation process.

Browse_Graphic_File_Type: JPEG

Browse_Graphic:

Browse_Graphic_File_Name: https://pubs.usgs.gov/ds/670/maps/area_a.jpg

Browse_Graphic_File_Description:

Trackline map of digital boomer subbottom profile data collected in Area A (refer to the full survey area map) during USGS cruises 03FGS01 and 03FGS02. This map was created at a scale of 1:200,000. Refer to the Lineage section below for the trackline map creation process.

Browse_Graphic_File_Type: JPEG

Browse_Graphic:

Browse_Graphic_File_Name: https://pubs.usgs.gov/ds/670/maps/area_b.jpg

Browse_Graphic_File_Description:

Trackline map of digital boomer subbottom profile data collected in Area B (refer to the full survey area map) during USGS cruises 03FGS01 and 03FGS02. This map was created at a scale of 1:200,000. Refer to the Lineage section below for the trackline map creation process.

Browse_Graphic_File_Type: JPEG

Data_Set_Credit:

Funding and (or) support for this study was provided by the USGS CMGP and the Florida Geological Survey (FGS). We thank R/V Geoquest captain Wade Stringer of the FGS for his assistance in data collection and Janice A. Subino (contracted with Jacobs Technology, Inc., at the SPCMSC) for her assistance in the preparation of this document. This document was also improved by the reviews of Jack Kindinger (SPCMSC) and Barbara Poore (SPCMSC).

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The validity or accuracy of marine subbottom profile profiles is highly qualitative and depends on equipment and operating condition variables. Visual inspection of the images rendered from the data did not show any major anomalies.

Logical_Consistency_Report:

These data sets are from two different field activities. Differences occur in navigation, acquisition equipment, and acquisition geometery between vessels and field activities.

Completeness_Report:

These data are collected along tracklines (2-D) and are therefore inherently incomplete. Geologic details between lines must be inferred. No data were collected for 03FGS01 line test2 or 03FGS02 line sj5. Navigation is intermittent for 03FGS01 lines sj17 and sj15. On the trackline maps, the location of missing navigation data within a line is inferred by linear interpolation of the first and last known data points, and large gaps are represented by a dashed yellow line.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

As the subbottom profile data were acquired, the position of the vessel was continuously determined by a CSI Wireless DGPS receiver, which is accurate to 3 meters. Positions were recorded and written to the trace headers in latitude and longitude about every 1 to 15 seconds. The navigation data have not been corrected to reflect the unknown offset between the shotpoint and GPS antenna.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Boomer data are relative to sea level. However, varying recorded static shifts of the data have been known to occur. Therefore, these data are not to be used for bathymetry.

Lineage:

Process_Step:

Process_Description:

Boomer processing: 03FGS01 line t4 and 03FGS02 line sj51 were divided into two lines each (for example, t4 became t4a and t4b) because the original total number of traces exceeded the maximum allowed by the processing system. The SEG Y data were processed with Seismic Unix software to produce the GIF seismic profile images included in this report. A representative boomer processing sequence consisted of (1) running a bandpass filter of 300-500-2,500-3,000 hertz, (2) applying automatic gain control, (3) displaying PostScript, and (4) converting of PostScript image to a GIF image.

Source_Used_Citation_Abbreviation: SEG Y

Process_Date: 2004

Source_Produced_Citation_Abbreviation: printable/SEG Y.gif

Source_Produced_Citation_Abbreviation: geospatial/SEG Y.jpg

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Shawn V. Dadisman

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 600 4th Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Contact_Voice_Telephone: (727) 803-8747, ext. 3029

Contact_Electronic_Mail_Address: sdadisman@usgs.gov

 

 

Process_Step:

Process_Description:

Navigation processing: Navigation files were extracted from the trace headers of each line using Seismic Unix software and edited to remove spurious data points and fix incorrectly recorded dates. They were then processed with PROJ.4 software (http://trac.osgeo.org/proj) to generate Zone 17 UTMs from latitude and longitude and reformatted for use with Environmental Systems Research Institute (ESRI) GIS software.

Source_Used_Citation_Abbreviation: 03fgs01.txt, s03fgs01.txt, 03fgs01_s.txt; 03fgs02.txt, s03fgs02.txt, 03fgs02_s.txt

Process_Date: 2004

Source_Produced_Citation_Abbreviation: 01trkln.shp, 01sht.shp, 01sol.shp

Source_Produced_Citation_Abbreviation: 02trkln.shp, 02sht.shp, 02sol.shp

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Shawn V. Dadisman

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 600 4th Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Contact_Voice_Telephone: (727) 803-8747, ext. 3029

Contact_Electronic_Mail_Address: sdadisman@usgs.gov

Process_Step:

Process_Description:

Trackline map creation: The trackline maps provided in this archive were created using ESRI ArcGIS 8.3 and 10 GIS software, exported to Adobe Illustrator for further editing, and saved in JPEG format. The cities and states layers are St. Johns River Water Management District (SJRWMD) data sets. The highways layer is a Bureau of Transportation Statistics/ESRI data set. The USGS is the originator of all other layers.

Source_Used_Citation_Abbreviation: SJRWMD and ESRI

Process_Date: 2004

Source_Produced_Citation_Abbreviation: all.mxd, area_a.mxd, and area_b.mxd

Source_Produced_Citation_Abbreviation: all.jpg, area_a.jpg, and area_b.jpg

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Shawn V. Dadisman

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 600 4th Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Contact_Voice_Telephone: (727) 803-8747, ext. 3029

Contact_Electronic_Mail_Address: sdadisman@usgs.gov

Process_Step:

Process_Description:

Data Series preparation: In addition to the process steps above, the following steps were taken to produce this Data Series: the handwritten logs were scanned and saved as PDF files, digital FACS logs were created using the handwritten logs and personal accounts of the crew members and saved as PDF files, and an HTML-based format was used to present the various parts of this archive.

Process_Date: 2004

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: 03fgs01.txt, 03fgs02.txt, s03fgs01.txt, and s03fgs02.txt

Entity_Type_Definition: Shotpoint navigation files

Entity_Type_Definition_Source:

Society of Exploration Geophysicists (SEG) Y headers (http://www.seg.org/resources/publications/misc/technical-standards).

Attribute:

Attribute_Label: FID*

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape*

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: Lon

Attribute_Definition: Longitude (decimal degrees)

Attribute_Definition_Source: World Geodetic System 1984 Geographic Coordinate System

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -81.382166

Range_Domain_Maximum: -81.116332

Attribute:

Attribute_Label: Lat

Attribute_Definition: Latitude (decimal degrees)

Attribute_Definition_Source: World Geodetic System 1984 Geographic Coordinate System

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 30.709674

Range_Domain_Maximum: 29.883766

Attribute:

Attribute_Label: Line

Attribute_Definition: Trackline number

Attribute_Definition_Source: U.S. Geological Survey

Attribute_Domain_Values:

Unrepresentable_Domain: Individual line names: test1 - t1.

Attribute:

Attribute_Label: Shot

Attribute_Definition: Shotpoint number

Attribute_Definition_Source: U.S. Geological Survey

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 20000

Attribute:

Attribute_Label: UTMX

Attribute_Definition: UTM-X coordinate (Zone 17N)

Attribute_Definition_Source: Universal Transverse Mercator Geographic Coordinate System

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 463383

Range_Domain_Maximum: 488780

Attribute:

Attribute_Label: UTMY

Attribute_Definition: UTM-Y coordinate (Zone 17N)

Attribute_Definition_Source: Universal Transverse Mercator Geographic Coordinate System

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3305925

Range_Domain_Maximum: 3397467

Attribute:

Attribute_Label: YEAR

Attribute_Definition: Year (in YYYY format)

Attribute_Definition_Source: U.S. Geological Survey

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2003

Range_Domain_Maximum: 2003

Attribute:

Attribute_Label: DOY:HR:MIN:SEC

Attribute_Definition: Day of year and Time (GMT)

Attribute_Definition_Source: Coordinated Universal Time

Attribute_Domain_Values:

Unrepresentable_Domain: Date and time in GMT format (day of year:hour:minute:second)

Overview_Description:

Entity_and_Attribute_Overview:

Binary data file: Trace data are available as binary files in SEG Y format. These files have a .tra extension and measure 1.3 to 96.1 megabytes. To access these files please go to https://pubs.usgs.gov/ds/670/segy/.

Entity_and_Attribute_Overview:

Graphic image file: Printable profiles are available as GIF images. The trackline maps are JPEG images. The trackline maps contain links to the printable seismic profile GIF images. To access these files please go to https://pubs.usgs.gov/ds/670/profiles/printable.

Entity_and_Attribute_Overview:

Navigation file: Navigation files are available as comma delimited ASCII text files; to access these files please go to https://pubs.usgs.gov/ds/670/nav. Provided are raw (unprocessed) shotpoint navigation files, processed shotpoint navigation files, and processed 500-shot-interval location files. Fields/Attributes [FID, Shape] marked above with an asterisk (*) were created by ESRI ArcGIS software and are used exclusively by the shapefiles created from the aforementioned text files; these fields are not included in the original navigation files. All remaining attributes listed in the above section that do not have an accompanying asterisk are found in 03fgs01.txt, 03fgs02.txt, s03fgs01.txt, and s03fgs02.txt.

Entity_and_Attribute_Overview:

GIS file: The GIS project used to create the trackline maps is provided as a zip file composed of ESRI map documents, shapefiles, and metadata. To access these files please go to https://pubs.usgs.gov/ds/670/software/arc

Entity_and_Attribute_Detail_Citation:

Barry, K.M., Cavers, D.A., and Kneale, C.W., 1975, Recommended standards for digital tape formats: Geophysics, v. 40, no. 2, p. 344-352. Available online at http://www.seg.org/resources/publications/misc/technical-standards.

Entity_and_Attribute_Detail_Citation:

Cohen, J.K., and Stockwell, J.W., Jr., 2005, CWP/SU: Seismic Unix Release 39: A free package for seismic research and processing: Golden, Colo, Center for Wave Phenomena, Colorado School of Mines. Available online at http://www.cwp.mines.edu/cwpcodes/.

Entity_and_Attribute_Detail_Citation:

Zihlman, F.N., 1992, DUMPSEGY v.1.0: A program to examine the contents of SEG Y disk-image seismic data: U.S. Geological Survey Open-File Report 92-590, 28 p. Available online at https://pubs.usgs.gov/of/1992/0590/report.pdf.

Entity_and_Attribute_Detail_Citation:

Disc Image Credit: Descloitres, J., MODIS Land Rapid Response Team at the NASA Goddard Space flight Center, 2003, Florida. A2003044.jpg. Available online at http://visibleearth.nasa.gov.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Shawn V. Dadisman

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical

Address: 600 4th Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: (727) 803-8747 ext. 3029

Contact_Electronic_Mail_Address: sdadisman@usgs.gov

Contact_Instructions: All of this report is available online. The SEG Y files are downloadable only from the Coastal and Marine Geoscience Data System (http://cmgds.marine.usgs.gov).

Resource_Description: U.S. Geological Survey Data Series 670

Distribution_Liability:

This DVD 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, 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.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: SEG Y

Format_Information_Content:

The SEG Y files on this disc conform to the SEG Y standard format (Barry and others, 1975), with the exception of the 3,600-byte reel identification header that is in ASCII format. Standard SEG Y uses an EBCDIC 3,600-byte reel identification header.

File_Decompression_Technique: None

Transfer_Size: 1.6 gigabytes

Digital_Transfer_Option:

Offline_Option:

Offline_Media: DVD

Recording_Format: ISO 9660

Compatibility_Information: UNIX, Linux, DOS, Macintosh

Digital_Form:

Digital_Transfer_Information:

Format_Name: map document, shapefile, metadata

Format_Information_Content:

The GIS project used to create the trackline maps is composed of map documents, shapefiles, and metadata. Map documents were created using ESRI ArcView 3.3 and ArcGIS 8.3 and 10 GIS software. The shapefiles provided may also be viewed using other versions of ArcView, ArcGIS, or public-domain software ArcExplorer (http://www.ESRI.com/software/arcexplorer/) or GeoMapApp (http://www.geomapapp.org), which are compatible with all platforms.

File_Decompression_Technique: unzip

Transfer_Size: 55.7 megabytes

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://pubs.usgs.gov/ds/670/software/arc/

Fees: None, if obtained online.

Ordering_Instructions:

Publications are available from USGS Information Services, Box 25286, Federal Center, Denver, CO 80225-0046 (telephone: 1-888-ASK-USGS, e-mail: infoservices@usgs.gov).

Technical_Prerequisites:

Use of SEG Y data requires specialized seismic processing software, such as public domain software Seismic Unix (http://www.cwp.mines.edu/cwpcodes/).