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U.S. Geological Survey Data Series 652

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Identification_Information:
Citation:
Citation_Information:
Originator: Janice A. Subino
Originator: Arnell S. Forde
Originator: Shawn V. Dadisman
Originator: Dana S. Wiese
Originator: Karynna Calderon
Originator: U.S. Geological Survey
Originator: Florida Geological Survey

Publication_Date: 2012
Title:
Archive of Digital Boomer Seismic Reflection Data Collected Offshore East-Central Florida during USGS Cruises 96FGS01 and 97FGS01 in November of 1996 and May of 1997
Geospatial_Data_Presentation_Form: Seismic Reflection Profile Section
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 652
Publication_Information:
Publication_Place: St. Petersburg, Fla.
Publisher: U.S. Geological Survey
Description:
Abstract:
In November of 1996 and May of 1997, the U.S. Geological Survey (USGS), in cooperation with the Florida Geological Survey (FGS), conducted geophysical surveys of the shallow geologic framework of the continental shelf offshore east-central Florida from Cape Canaveral to Sebastian Inlet. This report serves as an archive of unprocessed digital boomer seismic reflection data, navigation files, trackline maps, GIS files, FACS logs, and FGDC metadata. Filtered and gained digital images of the seismic profiles are also provided. The archived trace data are in standard Society of Exploration Geophysicists SEG Y format (rev. 0) (Barry and others, 1975) and may be downloaded and processed with commercial or public domain software such as Seismic Unix (SU). Example SU processing scripts and USGS software for viewing the SEG Y files (Zihlman, 1992) are also provided.
These data are also available for viewing using GeoMapApp (http://www.geomapapp.org/) and Virtual Ocean (http://www.virtualocean.org/) multi-platform open source software. In addition, the SEG Y files can also be downloaded from the USGS Coastal and Marine Geoscience Data System (http://cmgds.marine.usgs.gov).
Purpose:
The data archived here were collected under a cooperative agreement between the U.S. Geological Survey and the Florida Geological Survey.

Supplemental_Information:
The U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (SPCMSC) in Florida assigns a unique identifier to each cruise or field activity. For example, 96FGS01 tells us the data were collected in 1996 for the Florida Geological Survey (FGS) cooperative agreement and the data were collected during the first field activity for that study 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 cruise or field activity ID. The naming convention used for each seismic line is as follows: yy_e##_a, where 'yy' are the last two digits of the year in which the data were collected, 'e' is a one-letter abbreviation for the equipment type (for example, b for boomer), '##' is a two-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 at the sea surface and when discharged emits a short acoustic pulse, or shot, that propagates through the water and sediment column. The acoustic energy is reflected at density boundaries (such as the seafloor or sediment layers beneath the seafloor), detected by a receiver, and recorded by a PC-based seismic acquisition system. This process is repeated at timed intervals (for example, 0.25 seconds) and recorded for specific intervals of time (for example, 100 milliseconds). In this way, a two-dimensional vertical image of the shallow geologic structure beneath the ship track is produced.
A Huntec power supply provided 60-135 joules per shot for 96FGS01 and 480 joules per shot for 97FGS01. Reflected energy was received by an Innovative Transducers, Inc. (ITI) ST-5 streamer and recorded by Delph Seismic and DelphWin acquisition software. The streamer, which contains 10 hydrophones evenly spaced over a length of 6 meters (every 2 feet), was positioned parallel to the boomer sled and laterally separated from it by about 7 meters. Refer to figure 1 included with this archive for a diagram of acquisition geometry. For both cruises, the sample frequency of the data is 16 kilohertz, and record length is 100 milliseconds. Based on survey speeds of 3.5 - 4 knots and a shot rate of every 0.25 seconds, shot spacing is about every 0.5 meters.
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). The SEG Y files may be downloaded and processed with commercial or public domain software such as Seismic Unix (SU) (Cohen and Stockwell, 2005). See the How To Download SEG Y Data page for download instructions. 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 only needed to process or display the data with Delph Seismic software. Also provided are example Seismic Unix 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 filtered and 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 processed SEG Y data were exported to Chesapeake Technology, Inc. (CTI) SonarWeb software to produce geospatial versions of the profiles that allow the user to obtain a geographic location and depth from the profile for a curser position. This information is displayed in the status bar of the browser. The SEG Y files for both cruises do not fit on one disc, so they have been distributed onto two DVDs. Disc 1 contains data for all 96FGS01 lines and 97FGS01 lines sb_a1_a - sb_b25_b. Disc 2 contains 97FGS01 lines sb_b26_a - t1_sb. The 97FGS01 lines are grouped by alphabetical/numerical order, not the order in which they were collected. NOTE: The only supported Web browsers that properly display all features of the geospatial profiles are Internet Explorer 8 or greater for Windows and Firefox 3.6 or greater for all platforms. For both browsers, the status bar and JavaScript must be enabled. Firefox also requires "Change status bar text" to be checked under Advanced JavaScript Options. If using Internet Explorer 8, you must disable scripts/Active X controls. To do this, right click the information bar (found at the top of the page), left click "Allow Blocked Content...", and then select "Yes." Use of other browsers may result in spurious or no information given in the status window. Firefox may be downloaded at http://www.mozilla.org/products/firefox.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19961102
Ending_Date: 19970522
Currentness_Reference: Data collection interval
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -80.549274
East_Bounding_Coordinate: -80.273027
North_Bounding_Coordinate: 28.4108
South_Bounding_Coordinate: 27.86112

Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: Geology
Theme_Keyword: Coastal information
Theme_Keyword: Marine Seismic Reflection
Theme_Keyword: Boomer
Theme_Keyword: Society of Exploration Geophysicists
Theme_Keyword: SEG Y
Theme_Keyword: Florida Geological Survey
Theme_Keyword: 96FGS01
Theme_Keyword: 97FGS01
Place:
Place_Keyword_Thesaurus: GNIS
Place_Keyword: Atlantic Ocean
Place_Keyword: United States of America
Place_Keyword: Florida
Place_Keyword: Cape Canaveral
Place_Keyword: South Cocoa Beach
Place_Keyword: Sebastian Inlet

Access_Constraints: None. These data are held in the public domain.
Use_Constraints:
The U.S. Geological Survey and the Florida Geological Survey 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: Arnell Forde
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: Fla.
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: (727) 803-8747 ext. 3111
Contact_Electronic_Mail_Address: aforde@usgs.gov

Browse_Graphic:
Browse_Graphic_File_Name: https://pubs.usgs.gov/ds/652/maps/cruisenav/all.jpg
Browse_Graphic_File_Description:
Location map of digital boomer seismic reflection data collected during USGS cruises 96FGS01 and 97FGS01. This map was created at a scale of 1:300,000. 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/652/maps/cruisenav/area_a.jpg
Browse_Graphic_File_Description:
Trackline map of digital boomer seismic reflection data collected in Area A (refer to Area A of the full survey area map) during USGS cruises 96FGS01 and 97FGS01. This map was created at a scale of 1:115,000. 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/652/maps/cruisenav/area_b.jpg
Browse_Graphic_File_Description:
Trackline map of digital boomer seismic reflection data collected in Area B (refer to Area B of the full survey area map) during USGS cruise 97FGS01. This map was created at a scale of 1:115,000. 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/652/maps/cruisenav/area_c.jpg
Browse_Graphic_File_Description:
Trackline map of digital boomer seismic reflection data collected in Area C (refer to Area C of the full survey area map) during USGS cruise 97FGS01. This map was created at a scale of 1:115,000. 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/652/maps/cruisenav/area_d.jpg
Browse_Graphic_File_Description:
Trackline map of digital boomer seismic reflection data collected in Area D (refer to Area D of the full survey area map) during USGS cruise 97FGS01. This map was created at a scale of 1:115,000. 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 were provided by the USGS Coastal and Marine Geology Program (CMGP) and the Florida Geological Survey (FGS). We thank Henry Freedenberg formerly with the FGS and R/V G.K. Gilbert captain Richard Young (USGS - St. Petersburg, Fla.) for his assistance in data collection. This document was improved by the reviews of Chandra Dreher (USGS - St. Petersburg, Fla.) and Ginger Range (contractor with Jacobs Technology, Inc. at the USGS - St. Petersburg, Fla.).


Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The validity or accuracy of marine seismic reflection 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 are from two different cruises. Differences may occur in navigation, acquisition equipment, and acquisition geometry between vessels and field activities. Horizontal accuracy varies with navigation equipment used, and signal-to-noise ratio of the data changes with hydrophone streamers used. However, for most purposes, the profile data are comparable for all systems used.
Completeness_Report:
These data are collected along two-dimensional (2-D) tracklines and are therefore inherently incomplete. Geologic details between lines must be inferred. Serious problems were noticed with the GPS data for 97FGS01, and many of these errors could not be edited from the navigation files. Several lines are missing navigation at the start of line, end of line, or within the line, and spurious data points remain. Use these data with caution. Navigation is not available for 97FGS01 line sb_b64_b. Navigation is also intermittent for several 96FGS01 lines. On the trackline maps included with this archive, the location of missing navigation data within a line is inferred by linear interpolation of the first and last known data points. A dashed yellow line indicates a navigation gap of 1.5 minutes or more. A cross marks the location of the first available navigation fix for lines missing navigation for the first 100 shots or more. Asterisks mark the locations of spurious navigation fixes or missing navigation at the end of a line.

Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
As the seismic reflection data were acquired, the position of the vessel was continuously determined by a Rockwell PLGR GPS receiver, which is accurate to within 3 to 5 meters. Positions were recorded and written to the trace headers in latitude and longitude coordinates and seconds of ARC about every 60 seconds. The ASCII navigation files and trackline maps have not been corrected to reflect the approximately 20-meter offset between the boomer and GPS antenna. Refer to figure 1 included with this archive for a diagram of the acquisition geometry, including the GPS offset measurements. NOTE: The navigation data written to the "Source coordinates" SEG Y trace headers (bytes 73 - 80) were used to create the trackline maps; however, these data are only accurate within 1 seconds of arc, or 30.8 meters. Additional navigation data were recorded more accurately to the "Unassigned" trace headers (bytes 181 - 240) by the Delph Seismic acquisition software. Please see the SEG Y Format page for a detailed description of the SEG Y data format including byte number assignments and header value descriptions. The Delph Seismic navigation data can be accessed from the Navigation page under the Raw Shotpoint Navigation section.
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. An 18 millisecond recording delay was employed on 97FGS01 lines sb_b19, sb_b21_a, and sb_b21_b and appears on the geospatial profiles for these lines.

Lineage:
Process_Step:
Process_Description:
Boomer processing: Boomer data for 96FGS01 were collected in standard SEG Y format with the exception of lines sb_b6a and sb_b20a, which were collected in non-standard ELICS format and later converted to SEG Y format and renamed sb6a_sgy and sb20a_sy. All 97FGS01 boomer data were collected in ELICS format and later converted to SEG Y. The trace files for 96FGS01 lines sb_b2, sb_b4, sb_b8, sb_b10, sb_b12, sb_b14, sb_b18, and sb_b22 were divided into two trace files each (for example, sb_b2 became sb_b2a and sb_b2b) because the original total number of traces exceeded the maximum allowed by the processing software. The trace files for the following 97FGS01 lines were also divided into two trace files each: sb_a1, sb_a5, sb_b2sn, sb_b3, sb_b3sn, sb_b5, sb_b5ns, sb_b7, sb_b9, sb_b11, sb_b12r, sb_b13, sb_b15, sb_b17, sb_b21, sb_b23, sb_b24, sb_b25, sb_b26, sb_b27, sb_b28, sb_b29, sb_b31, sb_b32, sb_b33, sb_b35, sb_b36, sb_b37, sb_b38, sb_b41, sb_b42, sb_b43, sb_b45, sb_b46, sb_b48, sb_b50, sb_b52, sb_b54, sb_b56, sb_b58, sb_b60, sb_b62, sb_b64, sb_b66, sb_b68, sb_b70, sb_b72, sb_b74, sb_b76, sb_b78, and sb_b79. The SEG Y data were then processed with Seismic Unix to produce GIF images of the seismic profiles included in this report. A representative processing sequence consisted of (1) running a bandpass filter of 300-500 - 2500-3000 hertz, (2) applying automatic gain control, (3) displaying PostScript, and (4) converting of PostScript image to GIF image. All the processed SEG Y data were then exported to CTI SonarWeb software to produce an geospatial version of each profile that allows the user to obtain a geographic location and depth from the profile for a cursor position. Refer to the Supplemental Information section above for details on how to use the geospatial profiles.
Process_Date: 2005

Process_Step:
Process_Description:
Navigation processing: Shotpoint navigation files and 500-shot-interval location files were extracted from the trace headers of each line using Seismic Unix software. These files were edited to remove or correct spurious data points; however, serious errors remain (refer to the Completeness Report above for more information). These files were then processed with PROJ.4 software (http://trac.osgeo.org/proj/) to generate Zone 17N UTM coordinates from latitude and longitude coordinates. Text files for each seismic line were concatenated into two comma-delimited text files for each survey (for use with ESRI software), one set containing unique shotpoint positions (96fgs01.txt, 97fgs01.txt) and the other set containing the 500-shot-interval locations (s96fgs01.txt, s97fgs01.txt); both can be viewed within the nav folder.
Process_Date: 2005

Process_Step:
Process_Description:
Trackline map creation: The trackline maps provided in this archive were created with ESRI ArcGIS 9.0 software, exported to Adobe Illustrator for further editing, and saved in JPEG format. These maps are unprojected (WGS84 geographic). The cities layer is a St. Johns River Water Management District (SJRWMD) dataset. The USGS is the originator of all other layers. The trackline layer was created using the Points to Lines ArcScript, downloadable at http://arcscripts.esri.com/details.asp?dbid=12702. A map of trackline navigation for each seismic profile was also produced with CTI SonarWeb software.
Process_Date: 2005

Process_Step:
Process_Description:
Data Series preparation: In addition to the process steps described 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: 2005


Spatial_Data_Organization_Information:
Indirect_Spatial_Reference:
Horizontal X and Y locations (latitude and longitude and/or Zone 17N UTM coordinates) for each shot are provided in ASCII position files, along with the date and time (Greenwich Mean Time) the shot was recorded.


Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.0000027
Longitude_Resolution: 0.0000027
Geographic_Coordinate_Units: decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: WGS84
Ellipsoid_Name: WGS84
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio:
298.257222101000020000


Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label:
96fgs01.txt and s96fgs01.txt 97fgs01.txt and s97fgs01.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: WGS84
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -80.549274
Range_Domain_Maximum: -80.273027

Attribute:
Attribute_Label: Lat
Attribute_Definition: Latitude (decimal degrees)
Attribute_Definition_Source: WGS84
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 27.86112
Range_Domain_Maximum: 28.4108

Attribute:
Attribute_Label: Line
Attribute_Definition: Trackline number
Attribute_Definition_Source: User defined field describes the trackline number.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: sb_b2a
Range_Domain_Maximum: sb_b22b
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: sb_b12r_a
Range_Domain_Maximum: sb_b47

Attribute:
Attribute_Label: Shot
Attribute_Definition: Shotpoint number
Attribute_Definition_Source: User defined field describes the shotpoint number
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: 544191
Range_Domain_Maximum: 571570

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: 3081970
Range_Domain_Maximum: 3142834

Attribute:
Attribute_Label: YEAR
Attribute_Definition: Year of Seismic Reflection Survey
Attribute_Definition_Source: Calendar year for the United States
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: 1996
Codeset_Source: Gregorian Calendar System
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: 1997
Codeset_Source: Gregorian Calendar System

Attribute:
Attribute_Label: DOY:HR:MIN:SEC
Attribute_Definition: day of year:hour:minute:second
Attribute_Definition: day of year:hour:minute:second
Attribute_Definition_Source: Coordinated Universal Time
Attribute_Domain_Values:
Unrepresentable_Domain: day of year, hour, minute and second of data acquisition
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 range in size from 3.4 - 68.8 megabytes for disc 1 and 2.9 - 68.8 megabytes for disc 2.
Entity_and_Attribute_Overview:
Graphic image file: Printable profiles are available as GIF images. Geospatial profiles are available as HTML pages with accompanying JPEG images. The line navigation maps and trackline map are JPEG images. The trackline map contains links to the seismic printable profile GIF images.
Entity_and_Attribute_Overview:
Navigation file: Navigation files are available as comma delimited ASCII text files. Provided are raw (unprocessed) shotpoint navigation files, processed shotpoint navigation files and the processed 500-shot-interval location files for 96FGS01 and 97FGS01. Fields/Attributes [FID, Shape] marked above with an asterisk (*) were created by ESRI ArcGIS and are used exclusively by the shapefiles created from the aforementioned .txt 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 96fgs01.txt, s96fgs01.txt, 97fgs01.txt, and s97fgs01.txt. The raw navigation files do not contain the UTM coordinates.
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.
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 V1.0: 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 http://pubs.er.usgs.gov/usgspubs/ofr/ofr92590.
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 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: Fla.
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 on-line. However, the SEG Y files are only downloadable from the Coastal and Marine Geoscience Data System (http://cmgds.marine.usgs.gov).
Resource_Description: U.S. Geological Survey Data Series 652
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 (rev. 0)
Format_Information_Content:
The SEG Y standard format (Barry and others, 1975) consists of the following: a 3,600-byte reel identification header, with the first 3,200 bytes consisting of an ASCII header block followed by a 400-byte binary header block, both of which include information specific to line and reel number; a trace data block that follows the reel identification header, with the first 240 bytes of each trace block consisting of the binary trace identification header; and seismic data samples that follow the trace identification header. The SEG Y files can be downloaded from the USGS Coastal and Marine Geoscience Data System (http://cmgds.marine.usgs.gov).
File_Decompression_Technique: None
Transfer_Size: 5.88-gigabytes
Digital_Transfer_Option:
Offline_Option:
Offline_Media: DVD
Recording_Format: ISO 9660
Compatibility_Information: UNIX, Linux, DOS, Mac OS X

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 ArcGIS version 9.2 software. Shapefiles provided may be viewed using other versions of ArcGIS, ArcView, or public domain software ArcExplorer (http://www.esri.com/software/arcexplorer/). 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.
File_Decompression_Technique: unzip
Transfer_Size: 33.08-megabytes
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://pubs.usgs.gov/ds/652/software/arc/arc.zip
Fees: Prices vary.
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/).


Metadata_Reference_Information:
Metadata_Date: 20110316
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Janice Subino
Contact_Organization: Jacobs Technology, Inc.
Contact_Position: Media Specialist II
Contact_Address:
Address_Type: mailing and physical
Address: U.S. Geological Survey, 600 4th Street South
City: St. Petersburg
State_or_Province: Fla.
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: (727) 803-8747, ext. 3127
Contact_Electronic_Mail_Address: jsubino@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

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