Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2015 Title: PNG formatted images of Multi-channel streamer seismic-reflection profiles collected by the U.S. Geological Survey along the Delmarva Peninsula, MD and VA, 2014 Edition: 1.0 Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/F7MW2F60 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: https://doi.org/10.5066/F7MW2F60 Online_Linkage: https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/seismics/MCSimages/2014_002_FA_MCSimages.zip Larger_Work_Citation: Citation_Information: Originator: Elizabeth A. Pendleton Originator: S.D. Ackerman Originator: W.E. Baldwin Originator: W.W. Danforth Originator: D.S. Foster Originator: E.R. Thieler Originator: L.L. Brothers Publication_Date: 2015 Title: High-resolution geophysical data collected along the Delmarva Peninsula 2014, U.S. Geological Survey Field Activity 2014-002-FA Edition: 2.0 Geospatial_Data_Presentation_Form: view Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/F7MW2F60 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/F7MW2F60 Description: Abstract: The Delmarva Peninsula is a 220-kilometer-long headland, spit, and barrier island complex that was significantly affected by Hurricane Sandy. A U.S. Geological Survey cruise was conducted in the summer of 2014 to map the inner continental shelf of the Delmarva Peninsula using geophysical and sampling techniques to define the geologic framework that governs coastal system evolution at storm-event and longer timescales. Data collected during the 2014 cruise include swath bathymetry, sidescan sonar, chirp and boomer seismic-reflection profiles, acoustic Doppler current profiler, and sample and bottom photograph data. Processed data in raster and vector format are released here for the swath bathymetry, sidescan sonar, and seismic-reflection profiles. More information about the USGS survey conducted as part of the Hurricane Sandy Response-- Geologic Framework and Coastal Vulnerability Study can be found at the project website or on the WHCMSC Field Activity Web pages: https://woodshole.er.usgs.gov/project-pages/delmarva/ and https://cmgds.marine.usgs.gov/fan_info.php?fan=2014-002-FA Purpose: PNG images of each seismic profile were generated in order to incorporate images of the seismic profiles into Geographic Information System (GIS) projects and data archives utilizing HTML. These images represent approximately 1700 km of multi-channel streamer seismic-reflection data collected by the U.S. Geological Survey during cruise 2014-002-FA along the Delmarva Peninsula, MD and VA. Each profile image can be hotlinked to its corresponding trackline navigation contained within the Esri polyline shapefile '2014_002_FA_MCS_Tracklines.shp'. Even 100 reflection point markers along the top of the PNG images correlate to the positions of 100-rp intervals within the Esri point shapefile '2014_002_FA_MCS_rp100.shp'. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20140618 Ending_Date: 20140627 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -75.567453 East_Bounding_Coordinate: -74.685475 North_Bounding_Coordinate: 38.417831 South_Bounding_Coordinate: 37.538758 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: seismic profile Theme_Keyword: SEGY Theme_Keyword: seismic reflection Theme_Keyword: subbottom Theme_Keyword: WHCMSC field activity serial number 2014-002-FA Theme_Keyword: M/V Scarlett Isabella Theme_Keyword: boomer Theme_Keyword: S-boom Theme_Keyword: image Theme_Keyword: multi-channel streamer Theme_Keyword: GeoEel Theme_Keyword: Geometrics Theme_Keyword: Applied Acoustics Theme_Keyword: PNG Theme_Keyword: Picture Network Graphics Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: geoscientificInformation Place: Place_Keyword_Thesaurus: None Place_Keyword: North America Place_Keyword: Atlantic Ocean Place_Keyword: United States Place_Keyword: Maryland Place_Keyword: Delaware Place_Keyword: Virginia Place_Keyword: Assateague Island Place_Keyword: Ocean City Place_Keyword: Wallops Island Place_Keyword: Parramore Island Place_Keyword: Chincoteague Island Place_Keyword: Chincoteague Bay Place_Keyword: Delaware Bay Place_Keyword: Assateague Island National Seashore Place_Keyword: Chincoteague National Wildlife Refuge Place_Keyword: Isle of Wight Bay Place_Keyword: Fenwick Island Place_Keyword: Assawoman Bay Place_Keyword: Cape Henlopen Place_Keyword: Rehoboth Beach Place_Keyword: Delaware Seashore State Park Place_Keyword: Bethany Beach Place_Keyword: Toms Cove Place_Keyword: Berlin 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 originator of the dataset. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Elizabeth A. Pendleton 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: USA Contact_Voice_Telephone: 508-548-8700 x2259 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: ependleton@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/seismics/MCSimages/MCS_image.png Browse_Graphic_File_Description: Woods Hole Coastal and Marine Science Center sample MCS image along the Delmarva Peninsula Browse_Graphic_File_Type: PNG Native_Data_Set_Environment: Microsoft Windows 7 Enterprise Service Pack 1; ArcGIS Desktop 9.3 Service Pack 1; Build 1850 Data_Quality_Information: Logical_Consistency_Report: Processed seismic data were converted to PNG format for ease of seismic trace display. Quality control was conducted during processing. Completeness_Report: Seismic data were not logged during all turns and transits. There is no image, trackline, or reflection points for l7f1; the S-Boom was not firing, so no data were collected. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Differential Global Positioning System (DGPS) navigation data were acquired with a Hemisphere receiver and recorded with HYPACK (www.hypack.com). The DGPS antenna was located on the port-side of the acquisition van. The applied acoustics S-Boom source was towed 20-m astern of the M/V Scarlet Isabella. The 100-m long GeoEel 16-channel streamer was towed from the starboard side of the M/V Scarlett Isabella on a 4.82 m boom with 20 m of tow cable and 10 m of isolation in front of the start of the active channel. The Geometrics CNT-1 acquisition software logged the navigation coordinates (in arc seconds) to individual trace headers. Layback distance between the Hemisphere antenna and the source and receiver were calculated in post processing. The resulting horizontal accuracy is assumed to be +/- 2 m; however, inaccuracies likely exceed this value due to uncertainty of azimuths calculated in the layback correction (described in the processing steps). Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: Unpublished Material Title: Raw MCS data Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20140618 Ending_Date: 20140627 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: MCS data Source_Contribution: MCS seismic data were collected using S-Boom source and a 100-m long GeoEel 16 channel streamer. The applied acoustics S-Boom source was towed astern of the M/V Scarlet Isabella at a power level between 200 and 300 joules. The Geometrics GeoEel, 16-channel liquid filled digital streamer was towed from the starboard side of the vessel, and the center of the first channel of the active section was 10 meters aft of the boomer source. The streamer had a group interval of 3.25 meters connected to Geometrics Streamer Power Supply Unit (SPSU). Data acquired in Geometrics SEG-D format on Windows PC controller system using Geometrics CNT-1 software. The sample interval was 0.25 ms. GeoEel Configuration: Lines l1f1-l7f1 and t1fl-t6f1 had weight (2 kilograms) on the middle of each active section. From line t7f1 through to the end of survey the weight was removed from the two active sections (head and tail). S-Boom configuration: Lines l1f1, l2f1, and t1f1 used 2 plates at 200 joules; lines t2f1, t3f1, l3f1, and l4f1 used 1 plate at 200 joules; and lines from t4f1 to the end of survey used 3 plates at 300 joules. Process_Step: Process_Description: A SIOSEIS seismic processing software script was used as follows: the raw SEG-D shot files were read with the process SEGDDIN specifying geometrics format; the process HEADER was used to insert time of day into the header based on the start and end times recorded in the HYPACK files and what was entered in the survey log. The process GEOM was used to describe the shot and streamer geometries and to calculate the reflection point (RP) numbers used to gather (sort traces) the seismic line. The process GEOM also set the shot-receiver distance into the trace header of every trace. GEOM type 6 was specified (because positions were absent or bad in the header), which computes a distance from last shot (DFLS) for each shot based on the shot time in the header and the navigation from an ASCII file containing time and position. The ASCII navigation file was derived from the HYPACK data and merged with reflection point files with the Unix join command. The process GATHER was used to sort the shot order traces by the RP numbers (computed by GEOM). A normal move out (NMO) applied a travel time correction to each trace based on time offset and a velocity of 1500 m/s. A script was used to apply layback to the navigation supplied from HYPACK. Using Easting and Northing coordinates (UTM Zone 18 N, WGS84) from the trace headers, the script calculated easting and northing differential values between consecutive trace positions. Headings between consecutive traces were calculated using the arctangent function (arctan2(dy,dx)), and reciprocal back bearings were determined using a lookup table. Back bearings were smoothed along track using a moving median function. Layback easting and northing offsets were calculated by multiplying the linear distance between the GeoEel and the shipboard DGPS receiver by the sine and cosine of the smoothed back bearing, respectively. Offset values were then added to the original coordinates to produce layback positions. Lastly, the RP trace gathers were written with the process DISKOX in SEG-Y rev. 1, IEEE floating point format. This process step and all subsequent steps were completed by Dave Foster. Process_Date: 2014 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Dave Foster Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700x2271 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dfoster@usgs.gov Process_Step: Process_Description: A SIOSEIS script was used to stack the RP gathers, apply a bandpass filter and automatic gain control. The process DISKIN read the RP sorted SEG-Y file. The process STACK was used to sum traces, compute the average amplitude for each trace sample, and write the computed samples to one trace. The trace header values of the first trace in the gather were used for the stacked trace. The process FILTER applied a zero-phase bandpass frequency domain filter between 600 and 2000 Hz with a slope of 48 decibel per octave slope. The process AGC applied an automatic gain control (AGC) with a window length of 5 ms. The computed multiplier for each AGC window was reduced by fifty percent. Lastly, the processed stacked traces were written to disk with the process DISKOX in SEG-Y rev. 1 , IEEE floating point format. Process_Date: 2014 Process_Step: Process_Description: A Seismic Unix (version 4.0) script was used to read the stacked, filtered and gained SEG-Y files and plot the data as 8-bit gray scale Postscript files using the Seismic Unix 'psimage' algorithm. All images were created with a horizontal scale of 60 traces per inch. Images were plotted within a constant 18-inch vertical window (Two-Way Travel Time) duration. The Postscript images were then converted with ImageMagick (version 6.8.7-2) to PNG format. Process_Date: 2014 Process_Step: Process_Description: The online links to the data were updated to reflect the new server hosting the data. Additionally, other small edits could be made to the metadata, such as modifying http to https where appropriate. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. Process_Date: 20170419 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road 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 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster 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: Overview_Description: Entity_and_Attribute_Overview: The PNG images can be hyperlinked to their shapefile location in ArcGIS. The images show two-way travel time (seconds) on the y-axis and distance along profile on the x-axis. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Elizabeth A. Pendleton Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700x2259 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: ependleton@usgs.gov Resource_Description: USGS data release 2014-002-FA MCS images from the Delmarva Peninsula area (2014-002-FA_MCSimages.zip). The zip file contains a folder with 85 PNG images named according to line and file number convention with an _stack appended to note processing. A browse graphic (MCS_image.png) and FGDC CSDGM metadata files (2014_002_FA_MCS_Images.xml) in four standard formats are also included in the zip file. 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: PNG Format_Version_Number: ImageMagick (version 6.6.1) Format_Specification: Picture Network Graphic (PNG) Format_Information_Content: WinZip (v 14.5) file contains seismic reflection profile images of 16-channel streamer data collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center along the Delmarva Peninsula, MD and VA and the associated metadata. File_Decompression_Technique: use WinZip or pkUnzip Transfer_Size: 313 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/seismics/MCSimages/2014_002_FA_MCSimages.zip Network_Resource_Name: https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/ Network_Resource_Name: https://doi.org/10.5066/F7MW2F60 Access_Instructions: Data can be downloaded via the World Wide Web (WWW) Fees: none Technical_Prerequisites: These data can be viewed with any PNG image viewing software. The zip files must be uncompressed in order to view the images. Metadata_Reference_Information: Metadata_Date: 20170419 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Elizabeth Pendleton Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700x2259 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: ependleton@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_Access_Constraints: None Metadata_Use_Constraints: None