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Data Series 100

FGDC Formal Seismic Metadata

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Identification_Information:
Citation:
Citation_Information:
Originator: Karynna Calderon
Originator: Shawn V. Dadisman
Originator: Jack L. Kindinger
Originator: Jeffrey B. Davis
Originator: James G. Flocks
Originator: Dana S. Wiese
Publication_Date: 2004
Title:
Archive of Digital Boomer Seismic Reflection Data Collected During USGS Field Activities 93LCA01 and 94LCA01 in Kingsley, Orange, and Lowry Lakes, Northeast Florida, 1993 and 1994
Geospatial_Data_Presentation_Form: Seismic Reflection Profile Section
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 100
Publication_Information:
Publication_Place: St. Petersburg, FL
Publisher: U.S. Geological Survey
Description:
Abstract:
In August and September of 1993 and January of 1994, the U.S. Geological Survey, under a cooperative agreement with the St. Johns River Water Management District (SJRWMD), conducted geophysical surveys of Kingsley Lake, Orange Lake, and Lowry Lake in northeast Florida. This report serves as an archive of unprocessed digital boomer seismic reflection data, trackline maps, navigation files, GIS information, observer's logbook, Field Activity Collection System (FACS) logs, and formal FGDC metadata. A filtered and gained GIF image of each seismic profile is also provided.

The archived trace data are in standard Society of Exploration Geophysicists (SEG) SEG-Y format (Barry and others, 1975) and may be downloaded and processed with commercial or public domain software such as Seismic Unix (SU). Examples of SU processing scripts and in-house (USGS) software for viewing SEG-Y files (Zihlman, 1992) are also provided.

Purpose:
The data archived here were collected under a cooperative agreement with the St. Johns River Water Management District as part of the USGS Lakes and Coastal Aquifers (LCA) Project. For further information about this study, refer to <http://coastal.er.usgs.gov/stjohns>, Kindinger and others (1994), and Kindinger and others (2000).
Supplemental_Information:
The USGS Florida Integrated Science Center (FISC) - Coastal and Watershed Studies in St. Petersburg, Florida, assigns a unique identifier to each cruise or field activity. For example, 93LCA01 tells us the data were collected in 1993 for the Lakes and Coastal Aquifers (LCA) Project and that the data were collected during the first field activity for that project in that calendar year. For a detailed description of the method used to assign the field activity ID, refer to <http://walrus.wr.usgs.gov/infobank/programs/html/definition/activity.html>.

The boomer 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 the receiver, and recorded by a PC-based seismic acquisition system. This process is repeated at timed intervals (e.g., 0.5 s) and recorded for specific intervals of time (e.g., 100 ms). In this way, a two-dimensional vertical image of the shallow geologic structure beneath the ship track is produced.

A Huntec power supply provided 65 joules (J) per shot for 93LCA01 and 60 J per shot for 94LCA01. Reflected energy was received by an Innovative Transducers, Inc. (ITI) ST-5 streamer and recorded by Triton Elics Delph Seismic acquisition software. The streamer contains 10 hydrophones evenly spaced over a length of 6 m. It is unknown which hydrophones were used for each field activity. Acquisition geometry for 94LCA01 is recorded in the operations logbook included with this archive (Data Series 100). No logbook exists for 93LCA01. The sample frequency of the data was 4-6 kHz for 93LCA01 and 8-10 kHz for 94LCA01. Trace length was 100-749 ms for 93LCA01 and 124-125 ms for 94LCA01. Shot rate was 0.25-1 s for 93LCA01 and 0.25-0.5 s for 94LCA01. Shot spacing varied and should be calculated for each line of interest.

The unprocessed seismic data are stored in SEG-Y, integer, Motorola format, which is a standard digital format that can be read and manipulated by most seismic processing software packages (Barry and others, 1975). 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 Triton Elics 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.

Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19930824
Ending_Date: 19940131
Currentness_Reference: Data collection interval
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -82.219050
East_Bounding_Coordinate: -81.984683
North_Bounding_Coordinate: 29.976883
South_Bounding_Coordinate: 29.421833
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: marine seismic reflection
Theme_Keyword: boomer
Theme_Keyword: SEG-Y
Theme_Keyword: 93LCA01
Theme_Keyword: 94LCA01
Theme_Keyword: Lakes and Coastal Aquifers
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Florida
Place_Keyword: Kingsley Lake
Place_Keyword: Orange Lake
Place_Keyword: Lowry Lake
Access_Constraints: None. These data are held in the public domain.
Use_Constraints:
The U.S. Geological Survey and St. Johns River Water Mangament District 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: Jack L. Kindinger
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
Contact_Address:
Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: (727) 803-8747, ext. 3018
Contact_Electronic_Mail_Address: jkindinger@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: DVD/maps/all.jpg
Browse_Graphic_File_Description:
Trackline map of all digital boomer seismic reflection data collected during USGS Field Activities 93LCA01 and 94LCA01. This map was created at a scale of 1:265,000. Refer to the Lineage section below for the trackline map creation process.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: DVD/maps/kingsley.jpg
Browse_Graphic_File_Description:
Trackline map of digital boomer seismic reflection data collected during USGS Field Activity 93LCA01 in Kingsley Lake, Florida. This map was created at a scale of 1:24,000. Refer to the Lineage section below for the trackline map creation process.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: DVD/maps/orange.jpg
Browse_Graphic_File_Description:
Trackline map of digital boomer seismic reflection data collected during USGS Field Activities 93LCA01 and 94LCA01 in Orange Lake, Florida. This map was created at a scale of 1:55,000. Refer to the Lineage section below for the trackline map creation process.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: DVD/maps/orange_a.jpg
Browse_Graphic_File_Description:
Trackline map of digital boomer seismic reflection data collected during USGS Field Activities 93LCA01 and 94LCA01 in Area A of Orange Lake, Florida (refer to Area A of the Orange Lake map). This map was created at a scale of 1:3,500. Refer to the Lineage section below for the trackline map creation process.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: DVD/maps/lowry.jpg
Browse_Graphic_File_Description:
Trackline map of digital boomer seismic reflection data collected during USGS Field Activity 93LCA01 in Lowry Lake, Florida. This map was created at a scale of 1:24,000. 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 and the St. Johns River Water Management District. We thank boat driver Shane Dossat of the SJRWMD for his assistance in data collection. This document was improved by the reviews of Mario Fernandez and Charles W. Holmes of the USGS in St. Petersburg, Florida.

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 sets are from two different field activities. Differences occur in navigation, acquisition equipment, and acquisition geometery 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 tracklines (2D) and are therefore inherently incomplete. Geologic details between lines must be inferred. Digital data were not recoverable for 93LCA01 line KIN826_1, and digital data were not recorded for 93LCA01 line KIN826_6 and 94LCA01 lines ORJ127_2, ORJ128_1, ORJ128_3, and ORJ128_4. No data were collected for 93LCA01 lines KIN824_2, KIN826_3, ORJ828_1, ORJ828_5, ORJ828_7, LOW830_7, and LOW91_3. 93LCA01 lines 825TST, KIN824_1, KIN824_5, KIN826_2, KIN826_5, KIN827_2, ORJ828_3, ORJ828_4, LOW830_2, LOW830_3, LOW830_5, and LOW91_4 and 94LCA01 line ORJ131_1a are missing navigation for the first 100 shots or more. 93LCA01 lines KIN824_1, ORJ828_2, LOW830_4, and LOW91_5 are missing navigation for the last 150 to 2,676 shots. No navigation is available for 93LCA01 lines TEST520, TST1, KIN824_3, and KIN824_4, and navigation is intermittent for 93LCA01 line LOW91_4. On the trackline maps, the location of missing navigation data within a line is inferred by linear interpolation of the first and last known data points.
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 Trimble Nav Trac GPS receiver, which is accurate within 15 m. Positions were recorded and written to the trace headers about every 10-60 s for 93LCA01 and about every 10-30 s for 94LCA01. Navigation fixes were recorded in latitude and longitude in the trace headers. The navigation data have not been corrected to reflect the unknown offset between the shotpoint and GPS antenna.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Boomer data are relative to sea level. However, varying recorded static shifts of the data have been known to occur. Therefore, these data are not to be used for bathymetry.
Lineage:
Process_Step:
Process_Description:
Boomer processing: Triton Elics software was used to convert the original trace files from nonstandard ELICS format to standard SEG-Y format. During the format conversion process, the original trace files for 94LCA01 lines ORJ127_1, ORJ127_3, and ORJ131_1 were divided into two trace files each (e.g., ORJ127_1 became ORJ127_1a and ORJ127_1b) because the original total number of traces exceeded the maximum allowed by the processing system. The SEG-Y data were then processed with Seismic Unix to produce the GIF seismic profile images included in this report. A representative processing sequence consisted of: 1) Bandpass filter: 300-500-2500-3000 Hz, 2) Automatic gain control, 3) Postscript display, and 4) Conversion of Postscript image to a GIF image.
Process_Date: 2003
Process_Step:
Process_Description:
Navigation processing: Navigation files were extracted from the trace headers, edited to fix incorrect shot numbers, and reinjected into the headers using Triton Elics software. During the format conversion process, unique navigation fixes were extracted from the headers. The 500-shot-interval location files were extracted from the SEG-Y headers using Seismic Unix scripts. The navigation files were edited to remove or correct spurious data points and fix incorrectly recorded dates. They were then processed with PROJ.4 software (<http://www.remotesensing.org/proj>) to generate Zone 17 UTMs from latitude and longitude and reformat them for use with ESRI ArcView GIS software.
Process_Date: 2003
Process_Step:
Process_Description:
Trackline map creation: The trackline maps provided in this archive were created with Environmental Systems Research Institute (ESRI) GIS software ArcView 3.2 and 8.1, exported to Adobe Illustrator for further editing, and saved in JPEG format. The maps are set in geographic coordinates, NAD83 (unprojected). The cities layer is a Florida Division of Emergency data set. The lakes and rivers layers are Florida Department of Environmental Protection data sets. The roads layer is an ESRI/Geographic Data Technology, Inc. data set. The USGS is the originator of all other layers used.
Process_Date: 2003
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 logbook was scanned and saved as a PDF file, FACS logs were created using the handwritten logbook 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: 2003

Spatial_Data_Organization_Information:
Indirect_Spatial_Reference:
Horizontal X and Y locations (latitude and longitude and Zone 17 UTMs) 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
Denominator_of_Flattening_Ratio: 298.257

Entity_and_Attribute_Information:
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 183 KB to 80.2 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>.
Entity_and_Attribute_Detail_Citation:
Kindinger, J.L., Davis, J.B., Flocks, J.G., 1994, High-resolution single-channel seismic reflection surveys of Orange Lake and other selected sites of north central Florida: U.S. Geological Survey Open-File Report 94-616, 48 p. Also available online at: <http://coastal.er.usgs.gov/stjohns/ofr616>.
Entity_and_Attribute_Detail_Citation:
Kindinger, J.L., Davis, J.B., Flocks, J.G., 2000, Subsurface characterization of selected water bodies in the St. Johns River Water Management District, northeast Florida: U.S. Geological Survey Open-File Report 00-180, 46 p. Also available online at: <http://coastal.er.usgs.gov/publications/ofr/00-180>.
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.
Entity_and_Attribute_Overview:
Graphic image file: Profiles are available as GIF images that range in size from 18 KB to 3.9 MB. Trackline maps, which range in size from 80 to 138 KB, are JPEG images that contain hotlinks to the seismic profile GIF images.
Entity_and_Attribute_Overview:
Navigation file: Navigation files are available as ASCII text files. Raw navigation files range in size from 1 to 25 KB, edited navigation files from 107 to 154 KB, and edited 500-shot-interval location files from 29 to 33 KB.
Entity_and_Attribute_Overview:
GIS file: The GIS project used to create the trackline maps is provided as a zip file composed of map documents, shapefiles, and metadata. The map documents range in size from 275 to 577 KB, and the shapefiles range in size from 1.8 KB to 9.5 MB.

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Shawn V. Dadisman
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: (727) 803-8747, ext. 3029
Contact_Electronic_Mail_Address: sdadisman@usgs.gov
Contact_Instructions:
Data may be available on-line only by special arrangement with the distributor above.
Resource_Description: U.S. Geological Survey Data Series 100
Distribution_Liability:
This 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 makes 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 constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.

Although all data and software 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 these 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 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.
File_Decompression_Technique: None
Transfer_Size: 1,055 MB
Digital_Transfer_Option:
Offline_Option:
Offline_Media: DVD
Recording_Format: ISO 9660
Compatibility_Information: UNIX, LINUX, DOS, Macintosh
Digital_Form:
Digital_Transfer_Information:
Format_Name: map document, shapefile, metadata
Format_Information_Content:
The GIS project used to create the trackline maps is composed of map documents, shapefiles, and metadata. The map documents, created with ArcView 8.1, are compatible with ArcGIS 8.1. The shapefiles, created with ArcView 3.2, may be viewed using other versions of ArcView or public domain software ArcExplorer, available from the ESRI website at <http://www.esri.com/software/arcexplorer/>.
File_Decompression_Technique: unzip
Transfer_Size: 7.9 MB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: DVD/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, email: 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: 20040810
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Karynna Calderon
Contact_Organization: ETI Professionals, Inc.
Contact_Position: Geographer, Data Management Group
Contact_Address:
Address_Type: mailing and physical
Address: U.S. Geological Survey, 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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