Geospatial Navigational Data Associated with Chirp Sub-Bottom Profiles Collected During USGS Field Activity Number 2014-303-FA in June and July 2014 from Fire Island, New York

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Frequently anticipated questions:

What does this data set describe?

Title:
Geospatial Navigational Data Associated with Chirp Sub-Bottom Profiles Collected During USGS Field Activity Number 2014-303-FA in June and July 2014 from Fire Island, New York
Abstract:
During June 15-23 and July 10-12, 2014, the U.S. Geological Survey (USGS) conducted a nearshore geologic assessment, including bathymetric mapping, along Fire Island, New York (NY). This work was conducted in support of efforts to map the shoreface, characterize stratigraphy, and investigate changes in seafloor elevations near Fire Island, NY to assess the impacts of Hurricane Sandy to the area in October 2012. Geophysical data were collected as part of the Hurricane Sandy Supplemental Project (GS2-2B). The data release associated with this metadata record serves as an archive of high-resolution chirp sub-bottom trace data and navigation files. Shapefiles (.shp) provided in the data release represent point and polyline vector datasets of Field Activity Number (FAN) 2014-303-FA chirp sub-bottom profile trackline, start of line, and 1,000-shot-interval locations.
Supplemental_Information:
Additional survey and data details are available from the Field Activity Collection System (FACS) logs, which are included in the download file, 2014-303-FA_logs.zip.
  1. How might this data set be cited?
    Forde, Arnell S., 20240628, Geospatial Navigational Data Associated with Chirp Sub-Bottom Profiles Collected During USGS Field Activity Number 2014-303-FA in June and July 2014 from Fire Island, New York:.

    This is part of the following larger work.

    Forde, Arnell S., Miselis, Jennifer L., and Buster, Noreen A., 20240628, Chirp Sub-Bottom Profile Geophysical Data Collected in 2014 From Fire Island, New York: U.S. Geological Survey data release doi:10.5066/P13TMXXY, U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -73.2225
    East_Bounding_Coordinate: -72.8594
    North_Bounding_Coordinate: 40.7300
    South_Bounding_Coordinate: 40.6093
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 15-Jun-2014
    Ending_Date: 12-Jul-2014
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: Vector digital data (point and polyline)
  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.
    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 0.0197454907. Longitudes are given to the nearest 0.0259102598. Latitude and longitude values are specified in Decimal Degrees. The horizontal datum used is WGS_1984.
      The ellipsoid used is WGS_84.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257223563.
  7. How does the data set describe geographic features?
    Entity_and_Attribute_Overview:
    Geospatial files (2014-303-FA_gis.zip): The shapefiles created as part of this dataset are a derivative of the ASCII CSV navigation files provided in 2014-303-FA_nav.zip, which is available from the data release. The navigation and geospatial files share the same attribute labels and definitions, aside from "FID" and "Shape", which are specific to the .shp files. The detailed attribute descriptions for these files are provided in the data dictionary (DataDictionary_SBP.docx), the metadata are not complete without this file. The survey's trackline file, 2014-303-FA_trkln.shp (106 data records), is a polyline geospatial dataset of all the chirp sub-bottom profile tracklines; 2014-303-FA_1000sht.shp (1408 data records) is a point geospatial dataset representing the 1,000th shot interval; and 2014-303-FA_sol.shp (106 data records) provides the start of each seismic line as a point geospatial dataset.
    Entity_and_Attribute_Detail_Citation:
    The entity and attribute information were generated by the individual or agency identified as the originator of the dataset. Please review the rest of the metadata record for additional details and information.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Arnell S. Forde
  2. Who also contributed to the data set?
    Funding and (or) support for this study was provided by Hurricane Sandy Supplemental Funding, the USGS Coastal and Marine Hazards and Resources Program, and the U.S. Army Corps of Engineers (USACE), who provided the Lighter Amphibious Resupply Cargo (LARC) amphibious vehicle/survey vessel, personnel to pilot the vessel, geophysical and bathymetry equipment to conduct this survey, and personnel to operate the survey equipment. Field activity planning performed by Cheryl Hapke (former USGS employee), Stan Locker (former USGS employee) and Jennifer Miselis (USGS) in collaboration with Jesse McNinch (former USACE employee) and Heidi Wadman (USACE); data collection conducted by Heidi Wadman (USACE), Jennifer Miselis (USGS), and Jesse McNinch (USACE); and data processing performed by Arnell Forde. This document was improved by scientific/editorial and metadata reviews from Rachel Marcuson and Breanna Williams of the PCMSC and SPCMSC, respectively.
  3. To whom should users address questions about the data?
    Arnell S. Forde
    U.S. Geological Survey
    Geologist
    600 4th Street South
    Saint Petersburg, FL
    USA

    (727) 502-8000 (voice)
    aforde@usgs.gov

Why was the data set created?

The purpose of the data release described herein is to archive and disseminate digital chirp sub-bottom profile data and associated files collected during USGS FAN 2014-303-FA. Additional survey and data details are available from the USGS Coastal and Marine Geoscience Data System (CMGDS) at, https://cmgds.marine.usgs.gov/fan_info.php?fan=2014-303-FA.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 26-Apr-2022 (process 1 of 2)
    Navigation information was extracted from the seismic trace headers (seismic data available from the data release) using Seismic Unix release 44 software (Cohen and Stockwell, 2010), processed with PROJ.5.1.0 software (https://proj.org/) to generate Universal Transverse Mercator (UTM) Zone 18 North (N) coordinates from latitude and longitude coordinates (World Geodetic System of 1984, WGS84), and then saved as ASCII text files in comma-separated values (CSV) format. Navigation files for each sub-bottom line, saved by line number, were concatenated into comma-delimited text files (.csv) so they could be represented geospatially in geographic information system (GIS) software. The final output files are as follows: (1) 2014-303-FA_nav.csv contains unique shotpoint positions (along each line) for the entire survey, (2) 2014-303-FA_1000sht.csv includes the 1,000-shot-interval locations that were generated to correlate shot locations along the trackline with evenly spaced 1,000-shot index markers along the top of the printable profile images, and (3) 2014-303-FA_sol.csv has the start-of-line locations for each trackline. These CSV files are provided in 2014-303-FA_nav.zip. Person who carried out this activity:
    Arnell S. Forde
    U.S. Geological Survey
    Geologist
    600 4th Street South
    St. Petersburg, FL
    USA

    727-502-8000 (voice)
    aforde@usgs.gov
    Data sources used in this process:
    • *.txt
    Data sources produced in this process:
    • 2014-303-FA_nav.csv
    • 2014-303-FA_1000sht.csv
    • 2014-303-FA_sol.csv
    Date: 26-Apr-2022 (process 2 of 2)
    The reformatted text files referenced in the previous process step were then further processed using Esri ArcGIS Pro 3.2.1 software to generate shapefiles. The 1,000-shot navigation file, 2014-303-FA_1000sht.csv, provided in the data release was imported into ArcGIS Pro software to produce a geographic representation of the 1,000-shotpoint data collected within the survey area. A 1,000-shot-interval point shapefile (2014-303-FA_1000sht.shp) was generated to correlate shot locations with evenly spaced 1,000-shot index markers along the top of the printable profile images. Likewise, a point shapefile containing the start of line locations for all chirp tracklines, that is based on the reformatted text file 2014-303-FA_sol.csv, was used to create 2014-303-FA_sol.shp. Finally, the 2014-303-FA_nav.csv file containing unique shotpoint positions was imported to ArcGIS Pro to produce a geographic representation of the sub-bottom profile tracklines collected within the survey area. The 'PointsToLine Line (Data Management)' geoprocessing tool was used to create a shapefile (2014-303-FA_trkln.shp) in which individual chirp shotpoints were connected to form tracklines. A non-proprietary version of the shapefiles was created with the 'Map To KML (Conversion)' geoprocessing tool that converted the map document layers to keyhole markup language (KML) format prior to them being compressed (zipped) and saved as a .kmz file (2014-303-FA.kmz). All geospatial files can be found in 2014-303-FA_gis.zip. Person who carried out this activity:
    Arnell S. Forde
    U.S. Geological Survey
    Geologist
    600 4th Street South
    St. Petersburg, FL

    (727) 502-8000 (voice)
    aforde@usgs.gov
    Data sources used in this process:
    • 2014-303-FA_1000sht.csv
    • 2014-303-FA_sol.csv
    • 2014-303-FA_nav.csv
    Data sources produced in this process:
    • 2014-303-FA_1000sht.shp
    • 2014-303-FA_sol.shp
    • 2014-303-FA_trkln.shp
    • 2014-303-FA.kmz
  3. What similar or related data should the user be aware of?
    Cohen, J.K., and Stockwell, J.W., Jr., 2010, Seismic Un*x Release No. 44: An open source software package for seismic research and processing: Center for Wave Phenomena, Colorado School of Mines, Golden, Colorado.

    Online Links:

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?
    As the sub-bottom profile data were acquired, the position of the vessel was continuously determined by a Real-Time Kinematic Global Positioning System (RTK-GPS) utilizing a base/rover setup, which is accurate to within 2 centimeters. Positions from the RTK-GPS were recorded and written to the seismic trace headers approximately every 0.10 seconds, with unique navigation fixes being recorded every second. The approximately 1-meter offset between the chirp and vessel's RTK-GPS antenna has not been accounted for in the comma-delimited American Standard Code for Information Interchange (ASCII) navigation or geospatial files.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    A total of 106 seismic lines were collected during this field activity.
  5. How consistent are the relationships among the observations, including topology?
    These datasets are from one field activity with consistent instrument calibrations. Seismic data were collected during two surveys, which occurred on (Leg 1) June 15-23 and (Leg 2) July 10-12, 2014.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints None. These data are held in the public domain.
Use_Constraints Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of the data in future products or derivative research.
  1. Who distributes the data set? (Distributor 1 of 1)
    SPCMSC Data Management Group
    U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
    600 4th Street South
    St. Petersburg, FL
    USA

    (727) 502-8000 (voice)
    gs-g-spcmsc_data_inquiries@usgs.gov
  2. What's the catalog number I need to order this data set? 2014-303-FA_1000sht.shp, 2014-303-FA_sol.shp, 2014-303-FA_trkln.shp, 2014-303-FA.kmz, DataDictionary_SBP.docx
  3. What legal disclaimers am I supposed to read?
    This publication was prepared by an agency of the United States Government. Although these data were processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein 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.
  4. How can I download or order the data?
  5. What hardware or software do I need in order to use the data set?
    The geospatial files were created for use with Esri ArcGIS Pro 3.2.1 software. They may also be viewed with QGIS (https://www.qgis.org/en/site/, 2024), Google Earth (https://earth.google.com/, 2024), or other GIS software capable of importing the data.

Who wrote the metadata?

Dates:
Last modified: 28-Jun-2024
Metadata author:
SPCMSC Data Management Group
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
600 4th Street South
St. Petersburg, FL
USA

(727) 502-8000 (voice)
gs-g-spcmsc_data_inquiries@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/2014-303-FA_geospatial_metadata.faq.html>
Generated by mp version 2.9.51 on Fri Jun 28 12:11:30 2024