Trackline navigation for EdgeTech SB-512i chirp and multichannel sparker seismic-reflection data collected in 2013 by Coastal Planning & Engineering, Inc. for the Maryland Energy Administration offshore of the Delmarva Peninsula (polyline shapefiles)

Frequently anticipated questions:

• What does this data set describe?
  1. How might this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How might this data set be cited?
   Foster, David S., 20230519, Trackline navigation for EdgeTech SB-512i chirp and multichannel sparker seismic-reflection data collected in 2013 by Coastal Planning & Engineering, Inc. for the Maryland Energy Administration offshore of the Delmarva Peninsula (polyline shapefiles): data release DOI:10.5066/P9GQY0ZN, U.S. Geological Survey, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

   Online Links:

   • https://doi.org/10.5066/P9GQY0ZN
   • https://www.sciencebase.gov/catalog/item/643718f2d34ee8d4addccdd5

   This is part of the following larger work.
   Foster, David S., Brothers, Laura L., Baldwin, Wayne E., and Pendleton, Elizabeth A., 2023, Geospatial data layers of shallow geology from the continental shelf of the Delmarva Peninsula, including Maryland and Virginia state waters: data release DOI:10.5066/P9GQY0ZN, U.S. Geological Survey, Reston, VA.

   Online Links:

   • https://doi.org/10.5066/P9GQY0ZN
   • https://www.sciencebase.gov/catalog/item/64370f69d34ee8d4addcc9b8

   Other_Citation_Details:

   Suggested citation: Foster, D.S., Brothers, L.L., Baldwin, W.E., and Pendleton, E.A., 2023, Geospatial data layers of shallow geology from the continental shelf of the Delmarva Peninsula, including Maryland and Virginia state waters: U.S. Geological Survey data release, https://doi.org/10.5066/P9GQY0ZN.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -74.867867
   East_Bounding_Coordinate: -74.5911186
   North_Bounding_Coordinate: 38.473447
   South_Bounding_Coordinate: 38.243705
   

3. What does it look like?

   https://www.sciencebase.gov/catalog/file/get/643718f2d34ee8d4addccdd5/?name=MEA_2013_chirp_tracklines_browse.png&allowOpen=true (PNG)

   Browse image of trackline navigation for EdgeTech SB-512i chirp seismic-reflection data collected in 2013 by Coastal Planning & Engineering, Inc. for the Maryland Energy Administration offshore of the Delmarva Peninsula, Maryland Wind Energy Area.

   https://www.sciencebase.gov/catalog/file/get/643718f2d34ee8d4addccdd5/?name=MEA_2013_MCS_sparker_tracklines_browse.png&allowOpen=true (PNG)

   Browse image of trackline navigation for multichannel sparker seismic-reflection data collected in 2013 by Coastal Planning & Engineering, Inc. for the Maryland Energy Administration offshore of the Delmarva Peninsula, Maryland Wind Energy Area

4. Does the data set describe conditions during a particular time period?

   Beginning_Date: 04-Jul-2013

   Ending_Date: 31-Aug-2013

   Currentness_Reference:

   ground condition

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: Polyline Shapefile
   

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • String (451)
   2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257224.
      
7. How does the data set describe geographic features?

   MEA_2013_chirp_tracklines.shp

   SB-512i trackline navigation shapefile for survey Coastal Planning and Engineering, Inc. 2013 survey (225 polyline features). (Source: U.S. Geological Survey)

   FID

   Internal feature number. (Source: Esri) Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: Esri) Shape type.

   Shape_Leng

   Length of seismic-reflection data line in meters (UTM Zone 18N, WGS 84) (Source: Esri)

   Range of values
   Minimum:	690.06413707
   Maximum:	47671.834887
   Units:	meters
   Resolution:	0.000001

   Line

   Name of the trackline along which seismic-reflection data were collected in the format: LineNumber_FileNumber as follows #_# (i.e.'001_2'). (Source: Coastal Planning and Engineering, Inc.) Character set

   MEA_2013_MCS_sparker_tracklines.shp

   Multichannel sparker trackline navigation shapefile for survey Coastal Planning and Engineering, Inc. 2013 survey (226 polyline features). (Source: U.S. Geological Survey)

   FID

   Internal feature number. (Source: Esri) Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: Esri) Shape type.

   Shape_Leng

   Length of seismic-reflection data line in meters (UTM Zone 18N, WGS 84) (Source: Esri)

   Range of values
   Minimum:	673.924269
   Maximum:	24958.339124
   Units:	meters
   Resolution:	0.000001

   Line

   Name of the trackline along which seismic-reflection data were collected in the format: LineNumber_FileNumber as follows #_# (i.e.'001_2'). (Source: Coastal Planning and Engineering, Inc.) Character set

   Entity_and_Attribute_Overview:

   The shapefiles MEA_2013_chirp_tracklines.shp and MEA_2013_MCS_sparker_tracklines.shp correspond to the 32-bit GeoTIFF files in this data release. The vector polylines show the distribution and distance between 2-D seismic-reflection profiles.

   Entity_and_Attribute_Detail_Citation: U.S. Geological Survey
   

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • David S. Foster
2. Who also contributed to the data set?
   Please recognize the Maryland Energy Administration and Coastal Planning and Engineering, Inc.
3. To whom should users address questions about the data?
   David S. Foster

   U.S. Geological Survey

   Geologist

   384 Woods Hole Rd.

   Woods Hole, MA
   

   USA

   508-548-8700 x2271 (voice)

   508-457-2310 (FAX)

   dfoster@usgs.gov

Why was the data set created?

How was the data set created?

1. From what previous works were the data drawn?

   Coastal Planning & Engineering, 2014 (source 1 of 1)

   Administration, Maryland Energy, 2014, Maryland Energy Administration High Resolution Geophysical Resource Survey Final Report of Investigations: Maryland Energy Administration: Coastal Planning & Engineering, Inc., a CB&I Company, Boca Raton, Florida.

   Online Links:

   • https://energy.maryland.gov/Reports/MEAGeophysicalSurveyReport2013.pdf

   Other_Citation_Details:

   The trackline navigation data that were used to georefrence SEG-Y files and interpret geologic units with Kingdom Suite Software 2d/3dPAK (ver. 2017 - 64-bit) can be requested from the Bureau of Ocean Energy and Management (BOEM).

   Type_of_Source_Media: Disk
   Source_Contribution:

   This report provided source provided documentation of the geophysical data (seismic-reflection profiles) for the Maryland Wind Energy Area. High-resolution chirp seismic-reflection profiles using an EdgeTech Geo-Star full spectrum sub-bottom (FSSB) system and SB-0512i towfish. The multichannel seismic system consisted of a Geo-Source 200 Marine Multi-Tip Sparker source and a 24-channel Geometrics Geoeel streamer. Descriptions of acquisition and processing parameters for the survey are provided by Coastal Planning & Engineering (2014) in the methods section of the report. Shallow geologic framework and surficial geology were interpreted from post-processed chirp and sparker seismic-reflection profiles.

2. How were the data generated, processed, and modified?

   Date: 2017 (process 1 of 2)

   Data files that were processed from JSF format files with Chesapeake Technology SonarWiz for the 2013 Maryland Wind Energy Area survey (Coastal Planning and Engineering, 2014). These files were obtained from the Bureau of Ocean Energy Management (BOEM).
   Shot point navigation for the chirp seismic data were provided in ASCII text format. The header (first four records) and first the next five records of one of the files are shown here for example.
   H Source File: C:\SonarWiz-Projects\MEA_2013_Seismic_A\JSF\001_1_1_of_1.jsf H Lat/Lon CoordSys: WGS-84 H X/Y CoordSys: UTM84-18N H Columns 67-80: YYDDDHHMMSS 001_1_1_of_1-CH1 66175A38154761N074355638W 535081 4235097 0.013216132204 001_1_1_of_1-CH1 66176A38154761N074355638W 535081 4235097 0.013216132204 001_1_1_of_1-CH1 66177A38154761N074355638W 535081 4235096 0.013216132204 001_1_1_of_1-CH1 66178A38154761N074355638W 535081 4235096 0.013216132204 001_1_1_of_1-CH1 66179A38154752N074355637W 535081 4235095 0.013216132204
   Field 1 = The original JSF file name (LineNumber_FileNumber_File 1 of 1-ChannelNumber) Field 2 = LatitudeLongitude in decimal degrees with implied six decimals Field 3 = UTM Zone 18 North X Coordinate in meters Field 4 = UTM Zone 18 North Y Coordinate in meters Field 5 = Date and time in the format YYDDDHHMMSS preceded by 0.0
   The Unix command grep removed header records for each file. The Unix cut command was used to cut fields by column number to save LineNumber_FileNumber, UTM X, and UTM Y from the text file into separate files for each file. The Unix paste command pasted the fields LineNumber_FileNumber, UTM X, and UTM Y into one file. The Unix command nl numbered records starting with one and incrementing by one for each file to represent a new field for shot (ping) number. The Unix command uniq filtered out duplicate XY coordinates for each file. The Unix cat command concatenated individual line files into one file. The Unix vi editor changed field delimiters to commas and add a header for each field before saving the file in CSV format. This file was used to load shot navigation into Kingdom Suite and used in the next process step.
   Common mid-point (CMP) navigation for the multichannel sparker data were provided by BOEM in ASCII text format. The header and first five records follows:
   # TRACE_SEQ_NO Col: 1 - 9 # CMP_NO Col: 11 - 19 # SHOT_ABOVE_CMP Col: 21 - 29 # CMP_XCENTER Col: 31 - 39 # CMP_YCENTER Col: 41 - 49 25 25 2.00 527408.56 4237194.91 26 26 3.00 527410.11 4237195.01 27 27 3.50 527411.66 4237195.24 28 28 4.00 527413.20 4237195.47 29 29 4.33 527414.75 4237195.68
   The Unix command grep removed the header records from each file. An awk script read each text file and saved the fields CMP_NO, CMP_XCENTER, CMP_YCENTER, and a new field Line using the input file name. The output changed field delimiters to commas. The Unix cat command concatenated individual line files into one CSV format file. The Unix vi editor was used to add a header for each field. This file was used to load shot navigation into Kingdom Suite and also used in the next process step.
   The contact person for this and all subsequent processing steps below is David S. Foster. Person who carried out this activity:
   

   David S Foster

   U.S. Geological Survey, Northeast Region

   Geologist

   384 Woods Hole Road

   Woods Hole, MA
   

   USA

   508-4548-8700 x2271 (voice)

   508-457-2310 (FAX)

   dfoster@usgs.gov

   Data sources used in this process:

   • Coastal Planning & Engineering (2014)

   Date: 2023 (process 2 of 2)

   1) The CSV files for chirp and sparker navigation created in the previous step were added as a standalone tables to an ArcGIS Pro 2.4.1 project map.
   2) Point feature classes were created from these tables using the Geoprocessing Tool XY Table To Point.
   3) Polyline feature classes were created from the point feature classes using the Geoprocessing Tool Points To Line. The unique line name features used the attribute Line in the Line Field and in the Sort Field to features for each line.
   4) The Geoprocessing Tool Feature Class To Shapefile created a polyline shapefiles.
   5) The shapefile names were changed to MEA_2013_chirp_tracklines.shp and MEA_2013_MCS_sparker_tracklines.shp.
   6) Both shapefiles were reprojected to a Geographic coordinates system to WGS 84 using the ArcMap 10.8.1 Project tool. No datum transformation was needed. Providing the data in a geographic coordinates system simplifies the integration of the dataset with other vector datasets.
   These are the two shapefiles included with this data release: MEA_2013_chirp_tracklines.shp and MEA_2013_MCS_sparker_tracklines.shp.

3. What similar or related data should the user be aware of?
   Brothers, Laura L., Foster, David S., Pendleton, Elizabeth A., and Baldwin, Wayne E., 2020, Seismic Stratigraphic Framework of the Continental Shelf Offshore Delmarva, U.S.A.: Implications for Mid-Atlantic Bight Evolution since the Pliocene: Marine Geology Volume 428, October 2020.

   Online Links:

   • https://doi.org/10.1016/j.margeo.2020.106287

   Other_Citation_Details:

   Use this citation to refer to the seismic stratigraphic units and unconformities represented in the structure surfaces and sediment thickness maps presented in this data release.

How reliable are the data; what problems remain in the data set?

1. How well have the observations been checked?
   
2. How accurate are the geographic locations?
   Navigational accuracy for seismic data acquired by Coastal Planning & Engineering (2014) used a DGPS system using STARFIX II network opertated by Fugro Inc. resulted in sub-mater accuracy of the navigation reference point (NRP) located on the ship. Horizontal offsets to geophysical systems were measured referenced to the NRP. The chirp tow vehicle had layback corrections applied from an ultra-short baseline (USBL) system or by a static layback when the USBL failed. Coastal Planning & Engineering (2014) state that positioning for the multichannel seismic data used DGPS and measured offsets and computed layback that were merged with the processed SEG-Y data.
3. How accurate are the heights or depths?
   There are no vertical attributes for the seismic navigation data.
4. Where are the gaps in the data? What is missing?
   All chirp and multichannel sparker from the 2013 Coastal Planning & Engineering (2014) within the Maryland Wind Energy Area were used to interpret the subsurface geologic units.
5. How consistent are the relationships among the observations, including topology?
   All chirp and multichannel sparker data from the 2013 Coastal Planning & Engineering (2014) survey were used to interpret the subsurface geologic units that are published in this data release. All seismic reflection data used in this data release were interpreted by Laura L. Brothers and David S. Foster. David S. Foster conducted the processing steps. Unless stated otherwise, all interpretations, two-way travel time conversions to depth, and horizon gridding were conducted in Kingdom Suite 2017 software.

How can someone get a copy of the data set?

1. Who distributes the data set? (Distributor 1 of 1)
   
   U.S. Geological Survey - ScienceBase

   Denver Federal Center, Building 810, Mail Stop 302

   Denver, CO
   

   United States

   1-888-275-8747 (voice)

   sciencebase@usgs.gov
2. What's the catalog number I need to order this data set? MEA_2013_chirp_tracklines.shp and MEA_2013_MCS_sparker_tracklines.shp are shapefiles representing the geospatial distribution of seismic-reflection profiles offshore of the Delmarva Peninsula, Maryland Wind Energy Area. The dataset also includes browse graphics and the associated CSDGM metadata in XML format.
3. What legal disclaimers am I supposed to read?
   Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.
4. How can I download or order the data?
   • Availability in digital form:

     Data format:	Zip file containing the shapefile of SB512i and multichannel sparker tracklines collected in 2013 by Coastal Planning & Engineering, Inc. for the Maryland Energy Administration offshore of the Delmarva Peninsula, Maryland Wind Energy Area and the associated metadata. in format Shapefile (version ArcMap 10.8.1) Shapefile Size: 27
     Network links:	https://www.sciencebase.gov/catalog/file/get/643718f2d34ee8d4addccdd5 https://www.sciencebase.gov/catalog/item/643718f2d34ee8d4addccdd5 https://doi.org/10.5066/P9GQY0ZN

   • Cost to order the data: None

5. What hardware or software do I need in order to use the data set?
   To utilize these shapefiles, a GIS software package capable of importing shapefiles is needed.

Who wrote the metadata?

Dates:

Last modified: 19-May-2023

Metadata author:

David S. Foster

U.S. Geological Survey

Geologist

384 Woods Hole Rd.

Woods Hole, MA

USA

508-548-8700 x2271 (voice)

508-457-2310 (FAX)

whsc_data_contact@usgs.gov

Contact_Instructions:

The metadata contact email address is a generic address in the event the person is no longer with the USGS.

Metadata standard:

FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)