Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2014 Title: NC_all100shot.shp: Shot point navigation at 100 shot intervals for EdgeTech SB-512i chirp seismic-reflection data collected in May 2012 by the U.S. Geological Survey within the Norfolk Canyon, mid-Atlantic margin (Esri point shapefile, Geographic, WGS 84) Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Open-File Report Issue_Identification: 2014-1118 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2014/1118/data/Norfolk_Canyon/GIS/NC_shotnav.zip Larger_Work_Citation: Citation_Information: Originator: Jeffrey Obelcz Originator: Daniel S. Brothers Originator: Uri S. ten Brink Originator: Jason D. Chaytor Originator: Charles R. Worley Originator: Eric M. Moore Publication_Date: 2014 Title: Chirp Seismic-Reflection Data From the Baltimore, Washington, and Norfolk Canyons, U.S. Mid-Atlantic Margin Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2014-1118 Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Online_Linkage: http://dx.doi.org/10.3133/ofr20141118 Online_Linkage: http://pubs.usgs.gov/of/2014/1118/ Description: Abstract: A large number of high-resolution geophysical surveys between Cape Hatteras and Georges Bank have been conducted by federal, state, and academic institutions since the turn of the century. A major goal of these surveys is providing a continuous view of bathymetry and shallow stratigraphy at the shelf edge in order to assess levels of geological activity during the current sea level highstand. In 2012, chirp seismic-reflection data was collected by the U.S. Geologial Survey aboard the motor vessel Tiki XIV near three United States mid-Atlantic margin submarine canyons. These data can be used to further our understanding of passive continental margin processes during the Holocene, as well as providing valuable information regarding potential submarine geohazards. For more information on the U.S. Geological Survey involvement in this effort, see . Purpose: This dataset contains shot point navigation at even 100 shot intervals (including both starting and end shots) for over 330 km of EdgeTech SB-512i Chirp seismic-reflection data collected by the U.S. Geological Survey during Woods Hole Coastal and Marine Science Center cruise 2012-005-FA within Norfolk Canyon. This dataset provides the GIS shot point navigation at an interval that corresponds readily with images produced from the seismic-reflection data. The dataset also serves as a navigation archive. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20120525 Beginning_Time: 0937 (UTC) Ending_Date: 20120527 Ending_Time: 0715 (UTC) Currentness_Reference: ground condition of survey on dates 20120525-20120527 Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -74.818539 East_Bounding_Coordinate: -74.530725 North_Bounding_Coordinate: 37.193447 South_Bounding_Coordinate: 37.003275 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: Seafloor Theme_Keyword: Marine Geology Theme_Keyword: field activity 2012-005-FA Theme_Keyword: field activity number 12005 Theme_Keyword: USGS CMG InfoBank ID T-05-12-MC Theme_Keyword: shot point navigation Theme_Keyword: seismic navigation Theme_Keyword: seismic profile Theme_Keyword: seismic reflection Theme_Keyword: chirp Theme_Keyword: EdgeTech Theme_Keyword: 512i Theme_Keyword: M/V Tiki XIV Theme_Keyword: M/V Tiki 14 Theme_Keyword: continental margin Theme_Keyword: submarine canyon Theme_Keyword: geohazards Theme_Keyword: shotpoint navigation Theme_Keyword: seismic-reflection data Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: location Place: Place_Keyword_Thesaurus: General Place_Keyword: North America Place_Keyword: United States Place_Keyword: Atlantic Ocean Place_Keyword: mid-Atlantic margin Place_Keyword: Maryland Place_Keyword: Norfolk Canyon Place_Keyword: Baltimore Canyon Trough Stratum: Stratum_Keyword_Thesaurus: General Stratum_Keyword: Seafloor Stratum_Keyword: Subsurface Stratum_Keyword: sea floor Temporal: Temporal_Keyword_Thesaurus: General Temporal_Keyword: 2012 Access_Constraints: None Use_Constraints: 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 source of this information. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jeffrey Obelcz Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: Massachusetts Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x. 2245 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: jobelcz@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2014/1118/data/Norfolk_Canyon/GIS/NC_all100shot_browse.jpg Browse_Graphic_File_Description: Shot point navigation at even 100 shot intervals for EdgeTech 512i chirp seismic-reflection data collected in and around Norfolk Canyon Browse_Graphic_File_Type: JPEG Native_Data_Set_Environment: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.1850 Cross_Reference: Citation_Information: Originator: John Stockwell Publication_Date: 2011 Title: CWP/SU: Seismic Un*x Publication_Information: Publication_Place: Golden, CO Publisher: Center for Wave Phenomena-Colorado School of Mines Online_Linkage: http://www.cwp.mines.edu/cwpcodes/index.html Cross_Reference: Citation_Information: Originator: Paul Henkart Publication_Date: 2011 Title: SIOSEIS Publication_Information: Publication_Place: La Jolla, California Publisher: Scripps Institution of Oceanography, UC San Diego Online_Linkage: http://sioseis.ucsd.edu/index.html Cross_Reference: Citation_Information: Originator: Michael W. Norris and Alan K. Faichney Publication_Date: 2002 Title: SEGY Rev. 1 Data Exchange Format 1 Publication_Information: Publication_Place: Tulsa, OK Publisher: Society of Exploration Geophysicists Online_Linkage: http://www.seg.org/documents/10161/77915/seg_y_rev1.pdf Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: All attributes were checked in a consistent manner. Logical_Consistency_Report: Any spurious data points were removed during processing. For each 100-shot interval line there is one seismic-profile image. No duplicates exist. Completeness_Report: Lines were serially recorded during the survey in the format "LXF1". When a file is named "LXF2" or has a file number greater than 2, the recording parameters were usually changed (record length and shot rate), as recorded in the ship's log. The following lines were either not recorded or excluded from this data release: L82F1, L87F1, L99F1, L115F1, L142F1 (all excluded due to negligible length). Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The SB-0512i was towed 3 meters below the sea surface approximately 10 m astern of the M/V Tiki XIV. Position data were provided by a Differential Global Positioning System (DGPS) navigation receiver mounted on the port aft side of the cabin. Layback positions, which account for the linear distance between the shipboard DGPS receiver and the towed chirp fish, were not calculated nor accounted for in the navigation. Positional accuracy is assumed to be +/- 20 m; layback calculations do not account for fish motions behind the vessel caused by sea state/ship speed changes in angle and scope of the tow cable. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: Unpublished Material Title: raw seismic navigation Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20120525 Beginning_Time: 0937 (UTC) Ending_Date: 20120526 Ending_Time: 0651 (UTC) Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: none Source_Contribution: Seismic-reflection data acquisition: Chirp seismic data were collected using an EdgeTech SB-0512i towfish (0.5-4.5 kHz pulse, 50 ms pulse length), which was towed astern of the M/V Tiki XIV of Ocean City, MD. Chesapeake Technologies' SonarWiz (v.4.04.0031) seismic acquisition software was used to control the chirp, digitally log trace data in the SEG-Y Rev. 1 format (IEEE floating point), and record GPS navigation coordinates to the SEG-Y trace headers (in arc seconds of Latitude and Longitude, multiplied by a scalar of 100). Trace lengths are constant within lines, but vary from line to line due to variable water depth in the survey area (the minimum trace length was 250 ms and the maximum 1400 ms). This yields a range of samples per trace from approximately 5435 (250 ms trace length) to 30435 (1400 ms trace length). Sample interval was kept at a constant .000046 s. The ping rate was set to be consistent with the trace length, so it varied between 250 ms and 1400 ms. Process_Step: Process_Description: Seismic Unix (version 4.2) was used to read SEG-Y files, write a Seismic Unix file, and extract SEG-Y trace header information, including shot number, longitude, latitude, year, Julian day, and time of day (UTC). Header information from each SEG-Y file was saved to text files after an AWK (no version) filter was used to maintain shots at multiples of 100 and shots with unique navigation coordinates. For the 100 shot multiples, the start and end shots of each line were preserved as well. End shots and shots at multiples of 100 may not have unique navigation coordinates. Separate text files containing unique shot navigation were also produced. Process_Date: 201206 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jeffrey Obelcz Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: Massachusetts Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x. 2245 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: jobelcz@usgs.gov Process_Step: Process_Description: The 100 shot interval text files produced from process step 1 were concatenated into a comma-delimited text file, then the text file was imported into ArcMap (version 9.3) using 'Add XY data' and saved as points (Geographic, WGS84) in the Esri shapefile format. Process_Date: 201305 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jeffrey Obelcz Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: Massachusetts Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x. 2245 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: jobelcz@usgs.gov 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: 3264 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: NC_all100shot Entity_Type_Definition: shot point navigation for seismic profiles (100 shot interval) Entity_Type_Definition_Source: USGS 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: line Attribute_Definition: line name corresponding to PNG format seismic-reflection profile images. The format of the linename is a combination of the survey line and the processing of the SEG-Y data. The line number is in the format LXXFY where XX is the line number, and Y is the file number on that line (in case more than one file was used to acquire a line). Lines with "topmute_sf" indicate that the software SIOSEIS was used to mute the first 10 ms of each seismic trace and then used identify the seafloor and then use this information to process 'swell' to minimize the effect of sea surface heave. Lines with only "sf" in the name had to have the seafloor manually picked and then insert that information into the SEG-Y header to enable the sea surface heaving to be minimized. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: character set. Attribute: Attribute_Label: ffid Attribute_Definition: name of seismic shot number Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 10573 Range_Domain_Maximum: 347065 Attribute_Units_of_Measure: shot Attribute: Attribute_Label: lon Attribute_Definition: longitude coordinate in decimal degrees, WGS84 Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -74.818539 Range_Domain_Maximum: -74.530725 Attribute_Units_of_Measure: decimal degrees Attribute_Measurement_Resolution: 0.000001 Attribute: Attribute_Label: lat Attribute_Definition: latitude coordinates in decimal degrees, WGS84 Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 37.003275 Range_Domain_Maximum: 37.193447 Attribute_Units_of_Measure: decimal degrees Attribute_Measurement_Resolution: 0.000001 Attribute: Attribute_Label: year Attribute_Definition: calendar year data were collected Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2012 Range_Domain_Maximum: 2012 Attribute_Units_of_Measure: year Attribute: Attribute_Label: jd_hour_mi Attribute_Definition: Julian day, hour, minute, and second the data were collected (UTC, format JD:HH:MM:SS). Julian day is the integer number representing the interval of time in days since January 1 of the year. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Although the value is represented as a number, the number as a whole doesn't have a meaning. This value has to be broken down to its separate components (julian day, hour, minute, second) to have numerical significance. Overview_Description: Entity_and_Attribute_Overview: The CSV file distributed with the shapefile has all the unique shot navigation. The columns of information are line, ffid, lon, lat, year, jd_hour_minute_second. These are the same attributes present in the shapefile, with the last field (jd_hour_minute_second) having a truncated name in the shapefile (jd_hour_mi). Likewise, these fields have the same definition as the shapefile. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Jeffrey Obelcz Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Country: U.S.A. Contact_Voice_Telephone: 508-548-8700 x. 2245 Contact_Electronic_Mail_Address: jobelcz@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 9.3 Format_Specification: Esri point shapefile Format_Information_Content: This zip file contains shot point navigation at even 100 shot intervals (NC_100shot.shp) for EdgeTech SB-512i chirp seismic-reflection data collected by the U.S. Geological Survey within and around Norfolk Canyon. The Zip file also contains a comma delimited file (NC_shotnav.csv), that contains every unique shot point for the same survey. This also includes associated metadata. File_Decompression_Technique: Use WinZip, 7zip, Peazip or pkUnzip. Compressed with WinZip v. 14.0. Transfer_Size: 2.9 MB Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2014/1118/data/Norfolk_Canyon/GIS/NC_shotnav.zip Network_Resource_Name: http://pubs.usgs.gov/of/2014/1118/ofr2014-1118-data-catalog.html Access_Instructions: Data can be downloaded via the world wide web (WWW) Digital_Form: Digital_Transfer_Information: Format_Name: CSV Format_Specification: comma separated values Format_Information_Content: This zip file contains shot point navigation at even 100 shot intervals (NC_100shot.shp) for EdgeTech SB-512i chirp seismic-reflection data collected by the U.S. Geological Survey within and around Norfolk Canyon. The Zip file also contains a comma delimited file (NC_shotnav.csv), that contains every unique shot point for the same survey. This also includes associated metadata. File_Decompression_Technique: Use WinZip, 7zip, Peazip or pkUnzip. Compressed with WinZip v. 14.0. Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2014/1118/data/Norfolk_Canyon/GIS/NC_shotnav.zip Network_Resource_Name: http://pubs.usgs.gov/of/2014/1118/ofr2014-1118-data-catalog.html Access_Instructions: Data can be downloaded via the world wide web (WWW) Fees: none Technical_Prerequisites: This zip file contains data available in Esri shapefile format. The zip file also contains associated metadata. The user must have software capable of uncompressing the zip file and displaying the shapefile. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing the data. A free data viewer, ArcExplorer, capable of displaying the data is available from Esri at www.esri.com. Metadata_Reference_Information: Metadata_Date: 20140624 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jeffrey Obelcz Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: U.S.A. Contact_Voice_Telephone: 508-548-8700 x. 2245 Contact_Electronic_Mail_Address: jobelcz@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time