Archive of Digitized Analog Boomer Seismic Reflection Data Collected from the Northern Gulf of Mexico: Intersea 1980

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Stephen T. Bosse
Originator: James G. Flocks
Originator: Arnell S. Forde
Publication_Date: 20201123
Title:
Archive of Digitized Analog Boomer Seismic Reflection Data Collected from the Northern Gulf of Mexico: Intersea 1980
Geospatial_Data_Presentation_Form: Multimedia presentation
Series_Information:
Series_Name: U.S. Geological Survey Data Release
Issue_Identification: doi:10.5066/P9EFUAN3
Publication_Information:
Publication_Place: St. Petersburg, FL
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.5066/P9EFUAN3
Description:
Abstract:
The U.S. Geological Survey (USGS) Coastal and Marine Hazards and Resources Program (CMHRP) has actively collected geophysical and sedimentological data in the northern Gulf of Mexico for several decades, including shallow subsurface data in the form of high-resolution seismic reflection profiles (HRSP). Prior to the mid-1990s most HRSP data were collected in analog format as paper rolls of continuous profiles up to 25 meters (m) long. As part of the National Geological and Geophysical Data Preservation Program (NGGDPP, https://datapreservation.usgs.gov/), and in collaboration with the Bureau of Ocean Energy Management, Marine Minerals Program, scientists from the USGS St. Petersburg Coastal and Marine Science Center (USGS-SPCMSC) converted analog paper records to digital format using a large-format continuous scanner. The scanned image files were subsequently processed to fix distortions and crop out blank spaces prior to exporting as industry standard Society of Exploration Geophysicists data exchange (SEG-Y) formatted files. This data release serves as an archive of HRSP profiles annotated with header information, converted SEG-Y files, navigation data, and cruise trackline shapefiles. The HRSP data were collected using a sparker seismic system onboard the research vessel (R/V) Amarillo and R/V Sea Raider. The two vessels collected seismic data along the northern Gulf of Mexico ranging from west of Sabine Pass, Texas to south of Marsh Island, Louisiana. The survey occurred from July 9 to September 26, 1980. Data collection and processing methods are described in USGS Data Series 1047 (Bosse and others, 2017).
Purpose:
To archive all digitized analog boomer seismic profile data and associated files collected along the northern Gulf of Mexico, during the R/V Amarillo and R/V Sea Raider geophysical cruises.
Supplemental_Information:
The USGS-SPCMSC currently holds 13 major geophysical surveys from the northern Gulf of Mexico in its paper repository. Over 2,000 line-kilometers (km) of data are available. Paper copies of data are difficult and expensive to duplicate and share with other facilities and cannot be analyzed using standard geographic information systems (GIS) and interpretative software. Conversion of this data into a usable digital format is necessary to archive the geologic information that otherwise might be lost, requiring additional redundant and expensive marine geophysical surveys. The USGS NGGDPP addresses the need to preserve, catalog, and provide access to geological and geophysical data for scientific research and economic development. In addition to the current efforts under the NGGDPP, four geophysical investigations from the 1980s and 1990s were previously archived through a preservation project in collaboration with the Bureau of Ocean Energy Management (Harrison and others, 2007; Sanford and others, 2009a, b, c). The USGS-SPCMSC scans its analog HRSP holdings using a large-format continuous scanner. The analog to digital conversion process used for this dataset is similar to the processes used previously in Harrison and others (2007) and Sanford and others (2009a, b, c). The digital files were converted into Tagged Image File Format (TIFF) for standard accessibility by raster image processors. The TIFF images of the seismic profiles were also converted into SEG-Y format. This standard non-proprietary format is the accepted industry standard for seismic data and can be accessed by all major seismic data processing and interpretation systems. Accompanying the HRSP are navigation and metadata files, which are generated for use in GIS, database and Internet Message Access Protocol (IMAP) services. Processed seismic profile images are also provided. The processed profiles provided in this data release are Portable Document Format (PDF) images that were created using Seismic Unix and/or ImageMagick software. The northern Gulf of Mexico is a passive continental margin, where minimal structural change to the shallow stratigraphy has occurred during the last few thousand years (Anderson and others, 2004). Therefore, subsurface data collected from this environment for the purposes of geologic assessment can be considered useful in perpetuity. The geologic information collected by the USGS in the northern Gulf of Mexico remains a valuable resource for sea floor and stratigraphic investigations and is continuously revisited by researchers interested in Holocene and recent earth processes. For example, decades-old geologic data are commonly used in sediment resource studies in coastal Louisiana (Kindinger and others, 2001; Kulp and others, 2002; Rogers and others, 2009) and previously collected datasets across the Mississippi-Alabama shelf have been used in recent geologic-framework assessments (Roberts and others, 2004; Greene and others, 2007; Flocks and others, 2009). The seismic data were collected using a Teledyne 40-tip Mini-Sparker and Hydrophone towed parallel to each other behind the vessels. The sparker floats 5 feet (ft) beneath the surface, while the hydrophone floats between 5 and 8 ft. Sparkers create sound waves from a collapsing bubble, which is a result of vaporizing water between positive and negative leads (Trabant, 1984). The signal emitted from the sparker source is received by a 5 m-long hydrophone streamer. The received signal was amplified and filtered using a Del Norte 502 Seismic Amplifier before being displayed on an EPC recorder. The signal was also recorded on tape by a Hewlett-Packard HP-3968 FM/Direct Recorder. The seismic returns were printed onto paper rolls as two-dimensional profiles representing shots horizontally (time along track) and depth (two-way travel time). Geographic positioning of the system was collected using a long-range navigation (LORAN-C) system and annotated onto the paper copies.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19800709
Ending_Date: 19800926
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -94.0523
East_Bounding_Coordinate: -91.8722
North_Bounding_Coordinate: 29.7316
South_Bounding_Coordinate: 28.3649
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:18839f9a-c4bb-4d65-8de3-c1f204b02d21
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificinformation
Theme_Keyword: oceans
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: marine geology
Theme_Keyword: geology
Theme_Keyword: sediment transport
Theme_Keyword: ocean processes
Theme_Keyword: coastal processes
Theme_Keyword: seismic reflection methods
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Marine
Theme_Keyword: Society of Exploration Geophysicists
Theme_Keyword: SEG-Y
Theme_Keyword: R/V Amarillo
Theme_Keyword: R/V Sea Raider
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Gulf of Mexico
Place_Keyword: Texas
Place_Keyword: Louisiana
Place_Keyword: Sabine Pass
Place_Keyword: Holly Beach
Place_Keyword: Marsh Island
Access_Constraints: None. These data are held in the public domain.
Use_Constraints:
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of these data in future products or derivative research.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Stephen T. Bosse
Contact_Organization: Cherokee Nation System Solutions/U.S. Geological Survey
Contact_Position: GIS Specialist II
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) 502-8000
Contact_Electronic_Mail_Address: sbosse@contractor.usgs.gov
Cross_Reference:
Citation_Information:
Originator:
Anderson, J.B., Rodriguez, A., Abdulah, K.C., Fillon, R.H., Banfield, L.A., McKeown, H.A., and Wellner, J.S.
Publication_Date: 20040101
Title:
Late Quaternary stratigraphic evolution of the northern Gulf of Mexico margins—A synthesis, in Anderson, J., and Fillon, R., eds., Late Quaternary stratigraphic evolution of the Northern Gulf of Mexico
Series_Information:
Series_Name: Society for Sedimentary Geology
Issue_Identification: 79
Other_Citation_Details: pages 1-23
Online_Linkage: https://doi.org/10.2110/pec.04.79.0001
Cross_Reference:
Citation_Information:
Originator: Barry, K.M., Cavers, D.A., and Kneale, C.W.
Publication_Date: 197504
Title: Recommended standards for digital tape formats
Series_Information:
Series_Name: Geophysics
Issue_Identification: v. 40, no. 2
Other_Citation_Details: pages 344-352
Online_Linkage: https://library.seg.org/doi/pdf/10.1190/1.1440530
Cross_Reference:
Citation_Information:
Originator: Bosse, S.T., Flocks, J.G., and Forde, A.S.
Publication_Date: 20170421
Title:
Digitized analog boomer seismic-reflection data collected during U.S. Geological Survey cruises Erda 90-1_HC, Erda 90-1_PBP, and Erda 91-3 in Mississippi Sound, June 1990 and September 1991
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 1047
Online_Linkage: https://doi.org/10.3133/ds1047
Cross_Reference:
Citation_Information:
Originator: Flocks, J.G., Ferina, N.F., and Kindinger, J.L.
Publication_Date: 2009
Title:
Recent geologic framework and geomorphology of the Mississippi-Alabama shelf, northern Gulf of Mexico, in, Buster, N.A., and Holmes, C.W., eds., Gulf of Mexico origin, waters, and biota: Volume III, Geology
Series_Information:
Series_Name: College Station, Texas, Texas A&M University Press
Issue_Identification: 3
Other_Citation_Details: pages 157-173
Online_Linkage: https://muse.jhu.edu/book/1783
Cross_Reference:
Citation_Information:
Originator: Greene, D.L., Jr., Rodriquez, A.B., and Anderson, J.B.
Publication_Date: 20070201
Title:
Seaward-branching coastal-plain and piedmont incised-valley systems through multiple sea-level cycles: Late Quaternary examples from Mobile Bay and Mississippi Sound, U.S.A.
Series_Information:
Series_Name: Journal of Sedimentary Research
Issue_Identification: 77
Other_Citation_Details: pages 139-158
Online_Linkage: https://doi.org/10.2110/jsr.2007.016
Cross_Reference:
Citation_Information:
Originator:
Harrison, A.S., Dadisman, S.V., Kindinger, J.L., Morton, R.A., Blum, M.D., Wiese, D.S., and Subino, J.A.
Publication_Date: 2007
Title:
Archive of digital and digitized analog boomer seismic reflection data collected during USGS cruise 96CCT02 in Copano, Corpus Christi, and Nueces Bays and Corpus Christi Bayou, Texas, July 1996
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 296
Online_Linkage: https://doi.org/10.3133/ds296
Cross_Reference:
Citation_Information:
Originator:
Kindinger, J.L., Flocks, J.G., Kulp, M.A., Penland, P.S., and Britsch, L.D.
Publication_Date: 2001
Title:
Sand resources, regional geology, and coastal processes for the restoration of the Barataria barrier shoreline
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 2001-384
Other_Citation_Details: 69 pages
Online_Linkage: https://doi.org/10.3133/ofr01384
Cross_Reference:
Citation_Information:
Originator:
Kulp, M.A., Howell, P.D., Adiau, S., Penland, P.S., Kindinger, J.L., and Williams, S.J.
Publication_Date: 2002
Title:
Latest Quaternary stratigraphic framework of the Mississippi River delta region
Series_Information:
Series_Name: Gulf Coast Association of Geological Societies Transactions
Issue_Identification: 52
Other_Citation_Details: pages 573-582
Online_Linkage:
Cross_Reference:
Citation_Information:
Originator:
Roberts, H.H., Fillon, R.H., Kohl, B., Robalin, J.M., and Sydow, J.C.
Publication_Date: 2004
Title:
Depositional architecture of the Lagniappe Delta: Sediment characteristics, timing of depositional events, and temporal relationship with adjacent shelf-edge deltas, in Anderson, J.B., and Fillon, R., eds., Late Quaternary stratigraphic evolution of the northern Gulf of Mexico
Series_Information:
Series_Name: Society for Sedimentary Geology
Issue_Identification: 79
Other_Citation_Details: pages 142-189
Online_Linkage:
Cross_Reference:
Citation_Information:
Originator: Rogers, B.E., Kulp, M.A., and Miner, M.D.
Publication_Date: 20090916
Title:
Late Holocene chronology, origin, and evolution of the St. Bernard shoals, northern Gulf of Mexico, USA
Series_Information:
Series_Name: Geo-Marine Letters
Issue_Identification: 29
Other_Citation_Details: pages 379-394
Online_Linkage: https://doi.org/10.1007/s00367-009-0162-6
Cross_Reference:
Citation_Information:
Originator: Sanford, J.M., Harrison, A.S., Wiese, D.S., and Flocks, J.G.
Publication_Date: 2009
Title:
Archive of digitized analog boomer seismic reflection data collected from the Mississippi-Alabama-Florida shelf during cruises onboard the R/V Kit Jones, June 1990 and July 1991
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 429
Other_Citation_Details: 2009a
Online_Linkage: https://doi.org/10.3133/ds429
Cross_Reference:
Citation_Information:
Originator: Sanford, J.M., Harrison, A.S., Wiese, D.S., and Flocks, J.G.
Publication_Date: 2009
Title:
Archive of digitized analog boomer and minisparker seismic reflection data collected from the Alabama-Mississippi-Louisiana shelf during cruises onboard the R/V Carancahua and R/V Gyre, April and July, 1981
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 428
Other_Citation_Details: 2009b
Online_Linkage: https://doi.org/10.3133/ds428
Cross_Reference:
Citation_Information:
Originator: Sanford, J.M., Harrison, A.S., Wiese, D.S., and Flocks, J.G.
Publication_Date: 2009
Title:
Archive of digitized analog boomer seismic reflection data collected from Lake Pontchartrain, Louisiana, to Mobile Bay, Alabama, during cruises onboard the R/V ERDA-1, June and August 1992
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 370
Other_Citation_Details: 2009c
Online_Linkage: https://doi.org/10.3133/ds370
Cross_Reference:
Citation_Information:
Originator: Trabant, P.K.
Publication_Date: 1984
Title: Applied High-Resolution Geophysical Methods
Publication_Information:
Publication_Place: Dordrecht, Netherlands
Publisher: Springer Netherlands
Online_Linkage: https://doi.org/10.1007/978-94-009-6493-8
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The validity or accuracy of sparker profiling data 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:
This dataset is from the USGS SPCMSC archive and has consistent instrument calibrations.
Completeness_Report:
This dataset is considered complete for the information presented. With the exception of lines 190a, 323a, and 344b, which were not found in the archives, all analog seismic profiles collected during the original survey were successfully scanned and converted to digital format. The seismic profiles provide a two-dimensional (2D) representation of the subsurface along the acquisition tracklines. Users are advised to read the rest of the metadata record carefully for additional details.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
As the seismic reflection data were acquired, the position of the vessel was recorded using a LORAN-C system. The accuracy of the LORAN-C varied from 528 to 1,320 feet (ft), with repeatable accuracy between 60 and 300 ft. Positions were recorded in latitude and longitude coordinates at various intervals and appear on the seismic profiles as incremental, hand-annotated vertical event marks. Navigation data were digitized from a trackline map in Global Mapper (v.20.1.0) and exported as a comma separated values file. For this cruise, the time between starting and ending times were interpolated.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
These data are not to be used for bathymetry. Two-way travel (TWT) times shown on the printable profile images are relative to local sea level at the time of data acquisition.
Lineage:
Process_Step:
Process_Description:
Raw data scanning - The seismic data collected from this survey is housed in the USGS SPCMSC archive. The analog sparker data are in the form of 30 centimeter (cm)-wide paper and vellum rolls. The various rolls can be up to 6 m long and contain multiple seismic tracklines. The rolls contain the seismic profile image with pertinent collection characteristics annotated during acquisition, such as shot number and time and may also include environmental conditions and equipment details. Horizontal lines across the profiles represent TWT time in milliseconds (ms), and vertical lines represent navigation fixes acquired and annotated as the survey was underway. The digitized navigation data were imported into Esri ArcGIS version 10.6 as point data. For mapping trackline positions the point shapefiles were converted to lines using the “make polylines from points” tool from the XTools Pro version 12.2 (build 2197) toolbar.
Source_Used_Citation_Abbreviation: TIFF
Process_Date: 2020
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Stephen T. Bosse
Contact_Organization: Cherokee System Solutions/U.S. Geological Survey
Contact_Position: GIS Specialist II
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) 502-8000
Contact_Electronic_Mail_Address: sbosse@contractor.usgs.gov
Process_Step:
Process_Description:
Cropping - The scanned TIFF images were imported into Adobe Photoshop (Ps) Creative Cloud 2019 and blank edge areas were cropped out to further reduce file size. For rolls that included more than one line of seismic data, the file was separated into individual lines. Separation was completed by cropping everything except for the line of interest, determined by the raw navigation information, from the original scan and saving it as a new file with its associated line name. The file naming convention is as follows: CruiseID-DataAssociation_trackline#.tif (for example, Intersea-PWH_186.tif). It includes the cruise identification (Intersea), data association (PWH [profiles with headers] or SEGY), and trackline number (sometimes this also includes a subsection letter after the line number for tracklines split between multiple rolls).
Source_Used_Citation_Abbreviation: TIFF
Process_Date: 2020
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Stephen T. Bosse
Contact_Organization: Cherokee Nation System Solutions/U.S. Geological Survey
Contact_Position: GIS Specialist II
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) 502-8000
Contact_Electronic_Mail_Address: sbosse@contractor.usgs.gov
Process_Step:
Process_Description:
Headers - Each image of the scanned seismic profiles also includes a header with associated information including cruise- and line-specific information and processing details. The header files were created in Microsoft Word for Office 365 version 16, exported as PDF files, appended to the far left of the image frame in Adobe Ps, and then flattened onto the image to reduce file size.
Process_Date: 2020
Source_Produced_Citation_Abbreviation: CruiseID-PWH_trackline#.tif
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Stephen T. Bosse
Contact_Organization: Cherokee Nation System Solutions/U.S. Geological Survey
Contact_Position: GIS Specialist II
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) 502-8000
Contact_Electronic_Mail_Address: sbosse@contractor.usgs.gov
Process_Step:
Process_Description:
Correcting scan distortion - Distortion correction is necessary because it is difficult to ensure vellum/paper rolls are fed into the scanner straight. Distortion correction is obtained by placing a guideline over the 0 ms line (water level) on the scan. It is important that horizontal lines are perpendicular to the vertical lines on the scans or the image to SEG-Y conversion will not be accurate. The distortion was corrected by using the Rectangular Marquee Tool in Adobe Photoshop to select and create a new layer of the distorted area of the scan. A skewed transform was performed, and the corrected images were saved into a new folder without layers (flattened) to reduce file size.
Source_Used_Citation_Abbreviation: TIFF
Process_Date: 2020
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Stephen T. Bosse
Contact_Organization: Cherokee Nation System Solutions/U.S. Geological Survey
Contact_Position: GIS Specialist II
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) 502-8000
Contact_Electronic_Mail_Address: sbosse@contractor.usgs.gov
Process_Step:
Process_Description:
Image to SEG-Y - The scanned, distortion-corrected images were converted to digital SEG-Y (.seg, which has the same file extension properties as .sgy) format revision 0 (Barry and others, 1975) using the proprietary software ImageToSEGY 2.2 from Chesapeake Technology. The scanned images were opened in ImageToSEGY and the export area was defined by assigning values to the top, bottom, left, and right pixel locations using the imaged water surface (0 ms), maximum two-way travel time (for example, 112.5 ms) and raw navigation data for each line. Trace amplitudes in the scanned profiles are represented by pixels, so each pixel becomes a trace sample and the sample rate of the converted SEG-Y version is the record length divided by the number of vertical pixels in the profile. For example, if the profile is 4,435 pixels vertically and the two-way travel time is 112.5 ms, then the sample rate for the SEG-Y file version is 0.000025 seconds (s).
Source_Used_Citation_Abbreviation: SEG
Process_Date: 2020
Source_Produced_Citation_Abbreviation: CruiseID-SEGY_trackline#.seg
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Stephen T. Bosse
Contact_Organization: Cherokee Nation System Solutions/U.S. Geological Survey
Contact_Position: GIS Specialist II
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) 502-8000
Contact_Electronic_Mail_Address: sbosse@contractor.usgs.gov
Process_Step:
Process_Description:
Process_Description: Seismic processing: The SEG-Y data were processed with Seismic Unix (Release 44) software to produce PDF images of the seismic profiles included in this data release. A representative data processing sequence consisted of (1) converting the SEG-Y file to SU format, (2) applying horizontal (number of traces) and vertical (two-way travel time) scales and generating a PostScript image of the traces, (3) converting the header file to a PostScript image then merging with the seismic profile image, and (4) converting the merged PostScript image to a PDF file.
Source_Used_Citation_Abbreviation: SEG-Y
Process_Date: 2020
Source_Produced_Citation_Abbreviation: *_scale.pdf
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: James G. Flocks
Contact_Organization: U.S. Geological Survey
Contact_Position: Research 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) 502-8000
Contact_Electronic_Mail_Address: jflocks@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity Point
Point_and_Vector_Object_Count: 8379
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.0197920992
Longitude_Resolution: 0.0225110386
Geographic_Coordinate_Units: Decimal seconds
Geodetic_Model:
Horizontal_Datum_Name: North American Datum 1983
Ellipsoid_Name: GRS_1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Intersea_Cruisepoints.shp and Intersea_nav.xlsx
Entity_Type_Definition:
ArcGIS shapefile and navigation file containing seismic profile data for the cruise. These attributes are all based on the point vector shapefile.
Entity_Type_Definition_Source: USGS
Attribute:
Attribute_Label: FID
Attribute_Definition: Feature ID
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: Point
Attribute:
Attribute_Label: Latitude
Attribute_Definition: Latitude (NAD83)
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 28.3649
Range_Domain_Maximum: 29.8568
Attribute_Units_of_Measure: Decimal Degrees
Attribute:
Attribute_Label: Longitude
Attribute_Definition: Longitude (NAD83)
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -94.0523
Range_Domain_Maximum: -91.8722
Attribute_Units_of_Measure: Decimal Degrees
Attribute:
Attribute_Label: Time
Attribute_Definition: Time at which shot was taken
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 00:00
Range_Domain_Maximum: 23:59
Attribute:
Attribute_Label: JD
Attribute_Definition: Julian Date
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 191
Range_Domain_Maximum: 270
Attribute:
Attribute_Label: Date
Attribute_Definition: Date associated with each shot
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 07/09/1980
Range_Domain_Maximum: 09/26/1980
Attribute:
Attribute_Label: Line
Attribute_Definition: Line number
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain:
Alphanumeric character string representing unique line numbers ranging from 185 to 348 with sub letters designating different sections of the line. In cases where there are more sub letters associated with SEGY, PWH, and PWS files than the navigation, the lines need to be split further due to the tech issues and bad weather that left major time gaps in the record. Not having a continuous record results in poor conversions with the ImageToSEGY software.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Stephen T. Bosse
Contact_Organization: Cherokee Nation System Solutions/U.S. Geological Survey
Contact_Position: GIS Specialist II
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) 502-8000
Contact_Electronic_Mail_Address: sbosse@contractor.usgs.gov
Contact_Instructions:
This report is available online. The SEG-Y files are downloadable from the USGS Coastal and Marine Geoscience Data System (CMGDS) at, https://cmgds.marine.usgs.gov/.
Resource_Description:
Intersea-SEGY_*.seg, Intersea-PWH_*.tif, Intersea_nav.xlsx, Intersea_Cruisepoints.shp
Distribution_Liability:
This 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 rev. 0 format (Barry and others, 1975) presented here consists of the following: a 3,600-byte reel identification header, with the first 3,200 bytes consisting of an American Standard Code for Information Interchange (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.
File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users.
Transfer_Size: 9858
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Fees: None
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: SHP, KMZ
Format_Information_Content:
The GIS project used to create the trackline map includes an Esri shapefile and metadata. Included in the zipped folder are the Intersea_Cruisepoints shapefile, Keyhole Markup Language (KMZ) file, and metadata. Map documents (not included) were created with Esri ArcGIS 10.6 software. The provided shapefiles may also be viewed using other versions of Esri desktop software including their free software or ArcGIS Explorer (http://www.esri.com/software/arcgis/explorer/index.html).
File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users.
Transfer_Size: 0.331
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Fees: None
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: PDF
Format_Information_Content:
Processed seismic profile images with axis scales and headers (.pdf).
File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users.
Transfer_Size: 5343
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Fees: None
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: TIFF
Format_Information_Content:
Printable seismic profiles with headers containing cruise, line, and scanning information (.tif).
File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users.
Transfer_Size: 13894
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Fees: None
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: XLSX
Format_Information_Content: Cruise navigation data (.xlsx).
File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users.
Transfer_Size: 0.469
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Fees: None
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: PDF
Format_Information_Content: Cruise logbook (.pdf).
File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users.
Transfer_Size: 21
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Fees: None
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: TIFF
Format_Information_Content: Cruise trackline map (.tif).
File_Decompression_Technique: Unzip using 7zip for PC users and BetterZip for Mac users.
Transfer_Size: 203
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Fees: None
Technical_Prerequisites:
Use of SEG-Y data requires specialized seismic processing software, such as public domain software Seismic Unix (https://wiki.seismic-unix.org/doku.php).
Metadata_Reference_Information:
Metadata_Date: 20201116
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Stephen T. Bosse
Contact_Organization: Cherokee Nation System Solutions/U.S. Geological Survey
Contact_Position: GIS Specialist II
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) 502-8000
Contact_Electronic_Mail_Address: sbosse@contractor.usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/Intersea_metadata.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:18:50 2021