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Identification_Information:
Citation:
Citation_Information:
Originator: Karynna Calderon
Originator: Shawn V. Dadisman
Originator: Jack L. Kindinger
Originator: Gina M. Peery
Originator: James G. Flocks
Originator: Dana S. Wiese
Originator: Mark Kulp
Originator: Shea Penland
Originator: Louis D. Britsch
Originator: Gregg R. Brooks
Publication_Date: 2003
Title:
Archive of Boomer Seismic Reflection Data Collected During USGS Cruises 00SCC02 and 00SCC04, Barataria Basin, Louisiana, May 12 - 31 and June 17 - July 2, 2000
Geospatial_Data_Presentation_Form: Seismic Reflection Profile Section
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 03-402
Publication_Information:
Publication_Place: St. Petersburg, FL
Publisher: U.S. Geological Survey
Description:
Abstract:
This archive consists of two-dimensional marine seismic reflection profile data collected in the Barataria Basin of southern Louisiana. These data were acquired in May, June, and July of 2000 aboard the R/V G.K. Gilbert. Included here are data in a variety of formats including binary, ASCII, HTML, PDF, RTF, shapefiles, and GIF and JPEG images. Binary data are in SEG-Y format and may be downloaded for further processing or display. Reference maps and GIF images of the profiles may be viewed with a web browser. The GIS information provided here is compatible with ESRI GIS software.
Purpose:
Marine seismic reflection data are used to image and map sedimentary and structural features of the seafloor and subsurface. These data are useful in mapping stratigraphy and in assessing other submarine geologic characteristics and features. The data presented here are useful in mapping sand deposits that may be used in Louisiana beach nourishment projects. These data were collected as part of a Louisiana Sand Resources Study done in cooperation between the USGS, U.S. Army Corps of Engineers, University of New Orleans, Louisiana Department of Natural Resources, and Eckerd College. This study is part of the USGS Subsidence and Coastal Change (SCC) Project. For further information about this study, refer to <http://soundwaves.usgs.gov/2000/06/index.html> and <http://soundwaves.usgs.gov/2000/07/fieldwork3.html>.
Supplemental_Information:
The USGS Center for Coastal and Watershed Studies team in St. Petersburg, Florida, assigns a unique identifier to all seismic data collected during each cruise or field activity. The method used to assign the identifier for the cruise or field activity is as follows: YYPPP##, where YY is the last 2 digits of the year in which the fieldwork is conducted, PPP is a 3-letter abbreviation for the USGS project the data are collected for, and ## is a 2-digit event tag that represents a discreet leg or time period of fieldwork. Here, for example, 00SCC02 tells us the data were collected in 2000 for the Subsidence and Coastal Change Project and that the data were collected during the second field activity for that project in that calendar year. For more information about USGS Coastal and Marine Geology Program Activity ID naming conventions, see <http://walrus.wr.usgs.gov/infobank/programs/html/definition/activity.html>.

Seismic reflection profiles are acquired by means of an acoustic source (usually generated electronically) and hydrophone or receiver arrays. Both elements are typically towed in the water behind a survey vessel. The sound source emits a short acoustic pulse 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) and detected at the receiver. This process is repeated at intervals ranging between 100 ms and 1 s depending on the seismic source employed. In this way, a two-dimensional vertical image of the geologic structure beneath the ship track is constructed.

The boomer energy source consists of capacitors that are charged to a high voltage and discharged through a transducer in the water. The frequency range of the source is between 300 and 3,000 Hz. The transducer was towed on a sled at the sea surface providing 100-300 joules per shot for 00SCC02 and 135 joules per shot for 00SCC04. Reflected energy was received by an Innovative Transducers, Inc. (ITI) ST5 streamer and recorded by PC-based Triton Elics Delph Seismic acquisition software. The streamer contains 10 hydrophones evenly spaced over 6 m. However, only data received by elements 4-8 were summed, resulting in a higher signal to noise ratio for the data. The streamer was positioned parallel to the boomer sled and laterally separated from it by about 7 m. The sample frequency of the data was 12 kHz. All tracklines were recorded to 100 ms. Based on survey speeds of 3.5 - 4 knots and a shot rate of every 0.5 s, the shot spacing was about 1 m.

During data acquisition, a 6 ms trigger delay of unknown origin was observed in the profiles. This delay resulted in an extra 6 ms being added to the top of each profile. To rectify this problem in the field, a 6 ms recording delay was introduced on some of the tracklines. Lines B00_20 - B00_36 and B00_38a - B00_50 were recorded with this delay. For consistency in this archive, the processed profile images of all other tracklines have been shifted up 6 ms. However, the SEG-Y files have not been altered. Any further processing of 00SCC02 lines B00_01 - B00_19 and B00_37 - B00_38 and all 00SCC04 lines (B00_51 - B00_124) should remove the upper 6 ms of the record.

Seismic data were stored in SEG-Y format, which is a standard digital format that can be read and manipulated by most seismic processing software packages. The SEG-Y file format includes a 3,200-byte descriptive header that contains detailed information regarding the data acquisition and processing parameters. All data presented here are stored in SEG-Y, integer, Motorola format. The SEG-Y formatted trace data files have a .TRA extension. Additional recording parameters for each seismic data file can also be found in the .PAR file associated with each .TRA file. However, the .PAR and .PLN files are only needed to process or display the data with Triton Elics Delph Seismic software. No digital data is available for lines B00_05a, B00_14, B00_28a, B00_52 - B00_65, or B00_82. The original trace files for 00SCC02 lines B00_41 and B00_48 were broken up into two or more trace files (e.g., B00_41 became B00_41a and B00_41b) because the original total number of traces exceeds the maximum allowed by the processing system.

To conform to ISO 9660 naming standards, the SEG-Y data files and associated navigation files were all renamed. The "bss" prefix of the original trackline names was shortened to a single "b." For example, trackline "bss00_01a" was renamed "B00_01a."

GPS navigation was provided to the acquisition system every second by a Trimble Centurian P-Code receiver. The accuracy of this receiver is within 100 m. The data required some editing to remove spurious data values and fix incorrectly recorded dates. The edited results were used to generate the trackline navigation maps presented here. The navigation data have not been corrected to reflect the 20-m offset between the shotpoint and the GPS antenna. Position fixes for every 500 shots and for the start of lines are also provided as an aid for registering of the data after plotting. All navigation files are stored as flat ASCII text files.

The trackline maps provided in this archive are unprojected, set in geographic coordinates, NAD83. They were created using ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved for the web in JPEG format. These JPEG images are viewable with a web browser. Also included on this disc are the map documents and shapefiles used to create the trackline maps. The map documents are compatible with ArcGIS 8.1 (Windows). The shapefiles may also be viewed using ArcView 3.x (Windows, Unix) or public domain software ArcExplorer 2.0 (Windows) and 4.0 (Windows, Mac OS X, Unix, Linux), which can currently be downloaded from the ESRI website at <http://www.esri.com/software/arcexplorer/index.html>.

Field Activity Collection System (FACS) logs are available in both HTML and Rich Text Format. Scanned versions of the original handwritten logbooks are also provided as PDF files.

Also included on this disc 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. These images can then be displayed using a variety of shareware programs such as ImageMagick (Unix, Linux) or a web browser.

Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20000512
Ending_Date: 20000702
Currentness_Reference: Data collection interval
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -90.212715
East_Bounding_Coordinate: -89.462509
North_Bounding_Coordinate: 29.431351
South_Bounding_Coordinate: 28.988865
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: marine seismic reflection
Theme_Keyword: boomer
Theme_Keyword: SEG-Y
Theme_Keyword: 00SCC02
Theme_Keyword: 00SCC04
Theme_Keyword: Subsidence and Coastal Change Project
Theme_Keyword: Louisiana Sand Resources Study
Theme_Keyword: Barataria Sand Survey (bss)
Theme_Keyword: beach nourishment
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Louisiana
Place_Keyword: Gulf of Mexico
Place_Keyword: Barataria Bay
Place_Keyword: Caminada Bay
Place_Keyword: Bay des Ilettes
Place_Keyword: West Champagne Bay
Place_Keyword: Sandy Point
Access_Constraints: None. These data are held in the public domain.
Use_Constraints:
The U.S. Geological Survey requests to be acknowledged as the originator of the data in future products or derivative research.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jack L. Kindinger
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
Contact_Address:
Address_Type: Mailing
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: (727) 803-8747, ext. 3018
Contact_Electronic_Mail_Address: jkindinger@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: DVD/maps/02all.jpg
Browse_Graphic_File_Description:
Trackline map of all boomer seismic reflection data collected during USGS Cruise 00SCC02. These data were collected in the Barataria Basin of Louisiana in May of 2000. This map is set in geographic coordinates, NAD83 (unprojected) and was created at a scale of 1:400,000. It was created using ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved for the web in JPEG format. The coastline layer was derived from 1:100,000 DLGs.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: DVD/maps/02a.jpg
Browse_Graphic_File_Description:
Trackline map of boomer seismic reflection data collected in Area A of Louisiana's Barataria Basin (refer to Area A of the full survey maps) in May of 2000 during USGS Cruise 00SCC02. This map is set in geographic coordinates, NAD83 (unprojected) and was created at a scale of 1:170,000. It was created using ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved for the web in JPEG format. The coastline layer was derived from 1:100,000 DLGs.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: DVD/maps/02b.jpg
Browse_Graphic_File_Description:
Trackline map of boomer seismic reflection data collected in Area B of Louisiana's Barataria Basin (refer to Area B of the full survey maps) in May of 2000 during USGS Cruise 00SCC02. This map is set in geographic coordinates, NAD83 (unprojected) and was created at a scale of 1:170,000. It was created using ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved for the web in JPEG format. The coastline layer was derived from 1:100,000 DLGs.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: DVD/maps/02c.jpg
Browse_Graphic_File_Description:
Trackline map of boomer seismic reflection data collected in Area C of Louisiana's Barataria Basin (refer to Area C of the full survey maps) in May of 2000 during USGS Cruise 00SCC02. This map is set in geographic coordinates, NAD83 (unprojected) and was created at a scale of 1:170,000. It was created using ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved for the web in JPEG format. The coastline layer was derived from 1:100,000 DLGs.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: DVD/maps/02d.jpg
Browse_Graphic_File_Description:
Trackline map of boomer seismic reflection data collected in Area D of Louisiana's Barataria Basin (refer to Area D of the full survey maps) in May of 2000 during USGS Cruise 00SCC02. This map is set in geographic coordinates, NAD83 (unprojected) and was created at a scale of 1:170,000. It was created using ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved for the web in JPEG format. The coastline layer was derived from 1:100,000 DLGs.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: DVD/maps/04all.jpg
Browse_Graphic_File_Description:
Trackline map of all boomer seismic reflection data collected during USGS Cruise 00SCC04. These data were collected in the Barataria Basin of Louisiana in June and July of 2000. This map is set in geographic coordinates, NAD83 (unprojected) and was created at a scale of 1:400,000. It was created using ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved for the web in JPEG format. The coastline layer was derived from 1:100,000 DLGs.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: DVD/maps/04a.jpg
Browse_Graphic_File_Description:
Trackline map of boomer seismic reflection data collected in Area A of Louisiana's Barataria Basin (refer to Area A of the full survey maps) in June and July of 2000 during USGS Cruise 00SCC04. This map is set in geographic coordinates, NAD83 (unprojected) and was created at a scale of 1:170,000. It was created using ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved for the web in JPEG format. The coastline layer was derived from 1:100,000 DLGs.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: DVD/maps/04b.jpg
Browse_Graphic_File_Description:
Trackline map of boomer seismic reflection data collected in Area B of Louisiana's Barataria Basin (refer to Area B of the full survey maps) in June and July of 2000 during USGS Cruise 00SCC04. This map is set in geographic coordinates, NAD83 (unprojected) and was created at a scale of 1:170,000. It was created using ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved for the web in JPEG format. The coastline layer was derived from 1:100,000 DLGs.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: DVD/maps/04c.jpg
Browse_Graphic_File_Description:
Trackline map of boomer seismic reflection data collected in Area C of Louisiana's Barataria Basin (refer to Area C of the full survey maps) in June and July of 2000 during USGS Cruise 00SCC04. This map is set in geographic coordinates, NAD83 (unprojected) and was created at a scale of 1:170,000. It was created using ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved for the web in JPEG format. The coastline layer was derived from 1:100,000 DLGs.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: DVD/maps/04d.jpg
Browse_Graphic_File_Description:
Trackline map of boomer seismic reflection data collected in Area D of Louisiana's Barataria Basin (refer to Area D of the full survey maps) in June and July of 2000 during USGS Cruise 00SCC04. This map is set in geographic coordinates, NAD83 (unprojected) and was created at a scale of 1:170,000. It was created using ESRI GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved for the web in JPEG format. The coastline layer was derived from 1:100,000 DLGs.
Browse_Graphic_File_Type: JPEG
Data_Set_Credit:
Funding and/or support for this study were provided by the Coastal and Marine Geology Program of the USGS, the U.S. Army Corps of Engineers, the University of New Orleans, the Louisiana Department of Natural Resources, and Eckerd College. We thank Chandra A. Dreher of the USGS in St. Petersburg, Florida, and Allison Peters, Carlos Alonzo, and Mike Brown of the University of New Orleans for their field support during data collection. Boat captains Dave Bennett of Eckerd College, and Richard W. Young and Keith A. Ludwig of the USGS in St. Petersburg, Florida, also assisted in data collection. We are grateful to Jeffrey S. Dismukes of the USGS in St. Petersburg, Florida, for his programs that helped to edit and reformat the navigation data. This document was improved by the reviews of Christopher C. Barton and Pamela L. Sutton of the USGS in St. Petersburg, Florida.
Native_Data_Set_Environment: SEG-Y

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. However, during data acquisition, a 6 ms trigger delay of unknown origin was observed in the profiles. This delay resulted in an extra 6 ms being added to the top of each profile. To rectify this problem in the field, a 6 ms recording delay was introduced on some of the tracklines. Lines B00_20 - B00_36 and B00_38a - B00_50 were recorded with this delay. For consistency in this archive, the processed profile images of all other tracklines have been shifted up 6 ms. However, the SEG-Y files have not been altered. Any further processing of 00SCC02 lines B00_01 - B00_19 and B00_37 - B00_38 and all 00SCC04 lines (B00_51 - B00_124) should remove the upper 6 ms of the record. To conform to ISO 9660 naming standards, the SEG-Y data files and associated navigation files were all renamed. The "bss" prefix of the original trackline names was shortened to a single "b." For example, trackline "bss00_01a" was renamed "B00_01a." The original trace files for 00SCC02 lines B00_41 and B00_48 were broken up into two or more trace files (e.g., B00_41 became B00_41a and B00_41b) because the original total number of traces exceeds the maximum allowed by the processing system.
Logical_Consistency_Report:
These data sets are from two cruises with consistent instrument calibrations.
Completeness_Report:
These data are collected along tracklines (2D). Therefore, data are inherently incomplete. Geologic details between lines must be inferred. All tracklines were recorded to 100 ms. No navigation was collected for line B00_01, and navigation is missing for the start of line B00_02. No digital data is available for tracklines B00_05a, B00_14, B00_28a, B00_52 - B00_65, or B00_82.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The positional accuracy was determined with a Trimble-Centurian P-Code GPS receiver. The accuracy of this receiver is within 100 m. The GPS string was fed directly to the Delph Seismic acquisition system, and navigation fixes were recorded in latitude and longitude in the SEG-Y headers. The sled was towed about 20 m behind the GPS antenna, and no correction for this offset has been made.
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. During data acquisition, a 6 ms trigger delay of unknown origin was observed in the profiles. This delay resulted in an extra 6 ms being added to the top of each profile. To rectify this problem in the field, a 6 ms recording delay was introduced on some of the tracklines. Lines B00_20 - B00_36 and B00_38a - B00_50 were recorded with this delay. For consistency in this archive, the processed profile images of all other tracklines have been shifted up 6 ms. However, the SEG-Y files have not been altered. Any further processing of 00SCC02 lines B00_01 - B00_19 and B00_37 - B00_38 and all 00SCC04 lines (B00_51 - B00_124) should remove the upper 6 ms of the record.
Lineage:
Process_Step:
Process_Description:
Boomer processing: Raw SEG-Y data were processed with Seismic Unix to produce the GIF seismic profiles included in this report. A representative data processing sequence consisted of 1) Bandpass filter: 300-500-2500-3000 Hz, 2) Automatic gain control, 3) Postscript display, and 4) Convert Postscript image to GIF image.
Process_Date: 2001
Process_Step:
Process_Description:
Positional (navigation) data: As the seismic reflection data were acquired, the position of the vessel was continuously determined by a GPS receiver. Positions were recorded approximately every second and written to the SEG-Y header. ASCII navigation and 500-shot interval navigation files were extracted from the SEG-Y headers using Seismic Unix scripts.
Process_Date: 2001
Process_Step:
Process_Description:
Editing navigation: ASCII navigation files were extracted from the SEG-Y headers, run through a filter to remove spurious data values, and manually edited to eliminate any remaining spurious values and fix incorrectly recorded dates. The data was also reformatted for use with ESRI's ArcView GIS software.
Process_Date: 2001
Process_Step:
Process_Description:
Open-file preparation: No processing has been done to the SEG-Y data files provided on this disc. The data were displayed as 8-bit gray scale Postscript files using the Seismic Unix 'psimage' algorithm. The Postscript images were then converted to GIF images.
Process_Date: 2001

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

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 m
Denominator_of_Flattening_Ratio: 298.257

Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Binary data file: Each profile is available as a binary file in Society of Exploration Geophysicists (SEG) SEG-Y format. A SEG-Y file consists of 1) a 3,200-byte file identification record of ASCII-formatted general information, 2) a 400-byte binary record with information such as sample rate and record length specific to the data set, and 3) multiple records, with one seismic reflection trace per record for boomer data. Each trace record is preceded by a 240-byte trace header containing information such as trace number and acquisition day and time specific to each trace. The trace data are represented as a time series of unitless 16-bit integer or 32-bit real numbers proportional to the reflection coefficient. The SEG-Y file is useful only if you have access to specialized software designed to process and display seismic reflection data. These SEG-Y files have a .TRA extension and range in size from 533 KB to 83.6 MB.
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, n.2, p. 344-352. Also available online at: <http://www.seg.org/publications/tech-stand/index_body.html>.
Entity_and_Attribute_Overview:
Graphic image file: Each profile is available as a GIF image. These profiles range in size from 28 KB to 4.8 MB. The trackline maps provided are JPEG images that contain hyperlinks to the seismic profile GIF images.

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
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:
Data may be available on-line only by special arrangement with the distributor above.
Resource_Description: U.S. Geological Survey Open-File Report 03-402
Distribution_Liability:
This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code.

Digital Versatile Disc (DVD) publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

Although all data published on this DVD have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: SEG-Y
Format_Information_Content:
The SEG-Y standard format (Barry et al., 1975) consists of the following: a 3,600-byte reel identification header with the first 3,200 bytes consisting of an ASCII header block and a 400-byte binary header block that both 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.
File_Decompression_Technique: None
Transfer_Size: 3,730 MB
Digital_Transfer_Option:
Offline_Option:
Offline_Media: DVD
Recording_Format: ISO 9660
Compatibility_Information: UNIX, LINUX, DOS, MAC
Digital_Form:
Digital_Transfer_Information:
Format_Name: ESRI map document, shapefile, metadata
Format_Information_Content:
GIS projects and layers used to create the trackline maps presented in this archive and associated metadata
File_Decompression_Technique: unzip
Transfer_Size: 25.6 MB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: DVD/software/arc/arc.zip
Fees: Prices vary.
Ordering_Instructions:
Most open-file reports are available from USGS Information Services, Box 25286, Federal Center, Denver, CO 80225-0046 (telephone: 1-888-ASK-USGS; email: infoservices@usgs.gov).
Technical_Prerequisites:
Use of SEG-Y data requires specialized seismic processing software, such as Unix or Linux-based public domain software Seismic Unix (SU) developed by the Colorado School of Mines Center for Wave Phenomena and downloadable at <http://www.cwp.mines.edu/cwpcodes/index.html>.

Metadata_Reference_Information:
Metadata_Date: 20031210
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Karynna Calderon
Contact_Organization: U.S. Geological Survey
Contact_Position: Geographer
Contact_Address:
Address_Type: Mailing
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: (727) 803-8747, ext. 3143
Contact_Electronic_Mail_Address: kcalderon@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

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