IR_SEISNAV.SHP: Unique shot point navigation for chirp seismic data collected in Indian River Bay, Delaware, April 13, 2010, on U.S. Geological Survey Field Activity 2010-006-FA (Geographic, WGS 84)

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: John F. Bratton
Originator: VeeAnn A. Cross
Publication_Date: 2014
Title:
IR_SEISNAV.SHP: Unique shot point navigation for chirp seismic data collected in Indian River Bay, Delaware, April 13, 2010, on U.S. Geological Survey Field Activity 2010-006-FA (Geographic, WGS 84)
Edition: 1
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2011-1039
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage:
<http://pubs.usgs.gov/of/2011/1039/data/navigation/seismics/ir_seisnav.zip>
Online_Linkage:
<http://pubs.usgs.gov/of/2011/1039/html/ofr2011-1039-catalog.html>
Larger_Work_Citation:
Citation_Information:
Originator: V.A. Cross
Originator: J.F. Bratton
Originator: H.A. Michael
Originator: K.D. Kroeger
Originator: A. Green
Originator: E. Bergeron
Publication_Date: 2014
Title:
Continuous Resistivity Profiling and Seismic-Reflection Data Collected in April 2010 from Indian River Bay, Delaware
Edition: 1
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2011-1039
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: <http://pubs.usgs.gov/of/2011/1039/>
Online_Linkage: <http://dx.doi.org/10.3133/ofr20111039>
Description:
Abstract:
A geophysical survey to delineate the fresh-saline groundwater interface and associated sub-bottom sedimentary structures beneath Indian River Bay, Delaware, was carried out in April 2010. This included surveying at higher spatial resolution in the vicinity of a study site at Holts Landing, where intensive onshore and offshore studies were subsequently completed. The total length of continuous resistivity profiling (CRP) survey lines was 145 kilometers (km), with 36 km of chirp seismic lines surveyed around the perimeter of the bay. Medium-resolution CRP surveying was performed using a 50-meter streamer in a bay-wide grid. Results of the surveying and data inversion showed the presence of many buried paleochannels beneath Indian River Bay that generally extended perpendicular from the shoreline in areas of modern tributaries, tidal creeks, and marshes. An especially wide and deep paleochannel system was imaged in the southeastern part of the bay near White Creek. Many paleochannels also had high-resistivity anomalies corresponding to low-salinity groundwater plumes associated with them, likely due to the presence of fine-grained estuarine mud and peats in the channel fills that act as submarine confining units. Where present, these units allow plumes of low-salinity groundwater that was recharged onshore to move beyond the shoreline, creating a complex fresh-saline groundwater interface in the subsurface. The properties of this interface are important considerations in construction of accurate coastal groundwater flow models. These models are required to help predict how nutrient-rich groundwater, recharged in agricultural watersheds such as this one, makes its way into coastal bays and impacts surface water quality and estuarine ecosystems. For more information on the survey conducted for this project, see <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2010-006-FA>.
Purpose:
The purpose of the data layer is to provide all of the unique shot point navigation associated with the seismic-reflection profiles collected on U.S. Geological Survey Field Activity Number 2010-006-FA. This information can help correlate the seismic-reflection profiles with other features and data in the GIS. This clean, unique shot point navigation is also used as the navigation when loading the seismic data into a digital interpretation software package.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20100413
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -75.202086
East_Bounding_Coordinate: -75.062936
North_Bounding_Coordinate: 38.618986
South_Bounding_Coordinate: 38.569244
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Woods Hole Coastal and Marine Science Center
Theme_Keyword: WHCMSC
Theme_Keyword: Field Activity Number 2010-006-FA
Theme_Keyword: Info Bank ID K-6-10-DL
Theme_Keyword: navigation
Theme_Keyword: shot point navigation
Theme_Keyword: seismic navigation
Theme_Keyword: R/V Knob
Theme_Keyword: Lowrance GPS
Theme_Keyword: point shapefile
Theme_Keyword: EdgeTech 424
Theme_Keyword: chirp seismics
Theme_Keyword: Open-file Report 2011-1039
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: location
Theme_Keyword: oceans
Theme_Keyword: oceans and estuaries
Theme_Keyword: oceans and coastal
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: North America
Place_Keyword: North Atlantic Ocean
Place_Keyword: United States
Place_Keyword: Delaware
Place_Keyword: Indian River Bay
Place_Keyword: Indian River Inlet
Place_Keyword: Holts Landing
Place_Keyword: Piney Neck
Place_Keyword: Sussex County
Place_Keyword: Rosedale Beach
Access_Constraints: None.
Use_Constraints:
The public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: Woods Hole Coastal and Marine Science Center
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name:
<http://pubs.usgs.gov/of/2011/1039/data/navigation/seismics/ir_seisnav_th.gif>
Browse_Graphic_File_Description:
Thumbnail GIF image showing the location of all seismic shot points collected in Indian River Bay. The coastline is included for spatial reference.
Browse_Graphic_File_Type: GIF
Native_Data_Set_Environment:
Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4095
Cross_Reference:
Citation_Information:
Originator: Michael W. Norris
Originator: Alan K. Faichney
Publication_Date: 2002
Title: SEG Y rev1 Data Exchange Format
Geospatial_Data_Presentation_Form: document
Publication_Information:
Publication_Place: Tulsa, OK
Publisher: Society of Exploration Geophysicists
Online_Linkage: <http://www.seg.org/documents/10161/77915/seg_y_rev1.pdf>
Cross_Reference:
Citation_Information:
Originator: John W. Stockwell Jr.
Originator: Jack K. Cohen
Publication_Date: 2008
Title: The New SU User's Manual (version 4.0)
Geospatial_Data_Presentation_Form: document
Publication_Information:
Publication_Place: Golden, CO
Publisher: Center for Wave Phenomena - Colorado School of Mines
Online_Linkage: <http://www.cwp.mines.edu/cwpcodes/>

Data_Quality_Information:
Logical_Consistency_Report:
These points were visually checked to make sure they were viable fixes. All days were handled the same way.
Completeness_Report:
This shapefile represents all the unique shot point navigation collected during USGS Field Activity Number 2010-006-FA.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The navigation system used was a Lowrance 480M with an LGC-2000 Global Positioning System (GPS) antenna. The antenna was located above the seismic towfish tow point. The system towfish was attached by a short line to a cleat on a 2 x 6 board that was clamped across the bow of the boat. The towfish was on the starboard side of the boat, approximately 0.5 meters below the water surface. GPS data are assumed to be accurate within 10 meters on this survey.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Although bathymetry was not recorded directly with this system, bathymetry can be derived by tracing the seafloor reflector in the seismic-reflection profiles. The seismic towfish was attached to a cleat by a short line on the starboard side of the boat. The transducer draft was approximately 0.5 m below the water surface. The draft offset was not included in the data acquisition.
Lineage:
Source_Information:
Source_Contribution:
The seismic acquisition system used on this cruise was an EdgeTech 424 Chirp sub-bottom system with a 4 to 24 kHz pulse bandwidth and a 2 ms pulse. The system towfish was attached by a short line to a cleat on a 2 x 6 board that was clamped across the bow of the boat. The towfish was on the starboard side of the boat, approximately 0.5 meters below the water surface. The acquisition software used to record the data was Discover 3100 version 7.01. The data were recorded in the SEG-Y data format IBM floating point with navigation supplied by the Lowrance GPS system. The navigation was recorded in the header of the seismic data in an arc second format. The record length is 133 ms, with a sample interval of 23 micro-seconds and 5788 samples per trace. The fire-rate was between 4 and 6 shots per second. The GPS antenna was located above the tow position of the seismic transducer.
Process_Step:
Process_Description:
SeismicUnix version 4.0 was run on a Linux system to extract the navigation from the header of the seismic SEG-Y files and create SU formatted seismic files. The navigation goes into an ASCII file with the extension txt and the seismic data in the SeismicUnix format goes into a file with the extension su. The script used to accomplish this was read_ir:
# read SEG-Y standard file and convert to SU native format
  echo " "
  echo "Read SEG-Y file and output SU native format..."
  echo " "
# Set endian=0 for Intel or DEC or endian=1 for Sun, SGI, MAC...
segyread tape=$1.sgy verbose=1 vblock=1000 conv=1 endian=0 | \
 segyclean  > $1.su
# extract SEG-Y trace header values (ffid, source x, source y, year,
# julian day, hour, minute, second, source depth, source elevation)
  echo " "
  echo "Extracting SEG-Y trace header words... (ffid, source X, source Y, year, julian day, hour, minute, seconds)"
  echo " "

  echo " "
  echo "Writing shot navigation files to nav directory..."
  echo " "

 sugethw key=tracl,sx,sy,year,day,hour,minute,sec output=ascii < $1.su | \
 grep tracl | sed 's/=/	/g' | sed 's/ //g' | \
 awk '{FS="	"} {OFS="	"} {printf "%6s%7s\t%5s\t%6s\t%9.6f\t%9.6f\t%4s\t%3s:%02d:%02d:%02d\n", \
 $4,$6,line,$2,$4/360000,$6/360000,$8,$10,$12,$14,$16} ' line=$1 - > ../nav/$1.temp.txt

 sort -b -g -um -k 1,2 ../nav/$1.temp.txt | cut -f2-7 > ../nav/$1.txt rm ../nav/$1.temp.txt
This process step and all subsequent process steps were performed by the same person: VeeAnn A. Cross.
Source_Used_Citation_Abbreviation: *.sgy
Process_Date: 201005
Source_Produced_Citation_Abbreviation: *.su
Source_Produced_Citation_Abbreviation: *.txt
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: Woods Hole Coastal and Marine Science Center
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
The individual text files for the seismic navigation were combined into a single text file using the Unix command "cat". This file was edited with VI and all the tabs were replaced with commas, and a header line was added.
Source_Used_Citation_Abbreviation: *.txt
Process_Date: 201005
Source_Produced_Citation_Abbreviation: seisnav.csv
Process_Step:
Process_Description:
Used ArcMap 9.2 - Tools -Add XY Data to load the text file as an event theme - defined the projection as Geographic, WGS84. Then right mouse click on the event theme - Data - Export Data and output all the records to ir_seisnav.shp.
Source_Used_Citation_Abbreviation: seisnav.csv
Process_Date: 201005
Source_Produced_Citation_Abbreviation: ir_seisnav.shp

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 14416

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: ir_seisnav
Entity_Type_Definition: ESRI point shapefile
Entity_Type_Definition_Source: ESRI
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: linename
Attribute_Definition:
The unique identifier for each line of data acquistion. This is the prefix of the SEG-Y filename.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character set.
Attribute:
Attribute_Label: shot
Attribute_Definition: The seismic shot number associated with the navigation fix.
Attribute_Definition_Source: Software generated.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 8966
Attribute_Units_of_Measure: shot
Attribute:
Attribute_Label: longitude
Attribute_Definition: Longitude coordinate of the point in decimal degrees, WGS84.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -75.202086
Range_Domain_Maximum: -75.062936
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: latitude
Attribute_Definition: Latitude coordinate of the point in decimal degrees, WGS84.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 38.569244
Range_Domain_Maximum: 38.618986
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: year
Attribute_Definition: Year of data acquisition.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2010
Range_Domain_Maximum: 2010
Attribute_Units_of_Measure: year
Attribute:
Attribute_Label: jdtime
Attribute_Definition:
Julian day and time of the seismic shot in the format JJJ:HH:MM:SS. The Julian day number is the integer number representing the interval of time in days since January 1 of the year. The time is in UTC time which is +4 hours from local time during the survey.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character set.

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: Woods Hole Coastal and Marine Science Center
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Resource_Description: Downloadable Data
Distribution_Liability:
Neither the U.S. government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Shapefile
Format_Version_Number: ArcGIS 9.2
Format_Specification: Esri shapefile
Format_Information_Content:
This WinZip (v. 14) file contains the point shapefile, CSV file used to create the shapefile, as well as the associated metadata files.
Transfer_Size: 0.6 MB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<http://pubs.usgs.gov/of/2011/1039/data/navigation/seismics/ir_seisnav.zip>
Network_Resource_Name:
<http://pubs.usgs.gov/of/2011/1039/html/ofr2011-1039-catalog.html>
Network_Resource_Name: <http://dx.doi.org/10.3133/ofr20111039>
Digital_Form:
Digital_Transfer_Information:
Format_Name: CSV
Format_Specification: Comma separated values.
Format_Information_Content:
This WinZip (v. 14) file contains the point shapefile, CSV file used to create the shapefile, as well as the associated metadata files.
Transfer_Size: 0.6 MB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<http://pubs.usgs.gov/of/2011/1039/data/navigation/seismics/ir_seisnav.zip>
Network_Resource_Name:
<http://pubs.usgs.gov/of/2011/1039/html/ofr2011-1039-catalog.html>
Network_Resource_Name: <http://dx.doi.org/10.3133/ofr20111039>
Fees: None.
Technical_Prerequisites:
This zip file contains data available in Esri point shapefile format. The user must have software capable of uncompressing the zip file and reading/displaying the shapefile.

Metadata_Reference_Information:
Metadata_Date: 20140710
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: Woods Hole Coastal and Marine Science Center
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

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