Shapefile of the Single-beam Bathymetry Tracklines Surveyed in June 2015 from The Chandeleur Islands, Louisiana

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Frequently anticipated questions:


What does this data set describe?

Title:
Shapefile of the Single-beam Bathymetry Tracklines Surveyed in June 2015 from The Chandeleur Islands, Louisiana
Abstract:
As part of the Louisiana Coastal Protection and Restoration Authority (CPRA) Barrier Island Comprehensive Monitoring (BICM) Program, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted a single-beam bathymetry survey around the Chandeleur Islands, Louisiana in June 2015. The goal of the program is to provide long-term data on Louisiana’s barrier islands and use this data to plan, design, evaluate, and maintain current and future barrier island restoration projects. The data described in this report, along with USGS bathymetry data collected in 2013 as a part of the Barrier Island Evolution Research project covering the northern Chandeleur Islands, and data collected in 2014 in collaboration with the Louisiana CPRA Barrier Island Comprehensive Monitoring project around Breton Island, will be used to assess bathymetric change since 2006-2007 and serve as a bathymetric control in supporting modeling future changes in response to restoration and storm impacts. The survey area encompasses approximately 435 square kilometers (km2) of nearshore and back-barrier environments around Hewes Point, the Chandeleur Islands, and Curlew and Grand Gosier Shoals. This Data Series serves as an archive of processed single-beam bathymetry data, collected in the nearshore of the Chandeleur Islands, Louisiana from June 17-24, 2015 during USGS Field Activity Number (FAN) 2015-317-FA. Geographic information system data products include: a 200 meter-cell-size interpolated bathymetry grid, trackline maps, and xyz point data files. Additional files include error analysis maps, Field Activity Collection System logs, and formal Federal Geographic Data Committee metadata.
Supplemental_Information:
Trackline files were recorded during the survey using HYPACK version 14.0.9.47 (15BIM01, 15BIM02) and 13.0.09.17 (15BIM03) marine surveying, positioning, and navigation software. Within this document all platforms will be distinguished by FAN (15BIM01-R/V Sallenger, 15BIM02-R/V Jabba Jaw,15BIM03-R/V Chum) as separate but similar entities as all data are acquired, processed, and presented as a whole.
  1. How might this data set be cited?
    U.S. Geological Survey, 2016, Shapefile of the Single-beam Bathymetry Tracklines Surveyed in June 2015 from The Chandeleur Islands, Louisiana:.

    Online Links:

    This is part of the following larger work.

    Stalk, Chelsea A., DeWitt, Nancy T., Bernier, Julie C., Kindinger, Jack L., Flocks, James G., Miselis, Jennifer L., Locker, Stanley D., Kelso, Kyle W., and Tuten, Thomas M., 2016, Coastal Single-Beam Bathymetry Data Collected in 2015 from the Chandeleur Islands, Louisiana: U.S. Geological Survey Data Series 1039, U.S. Geological Survey, St. Petersburg, Florida.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -89.082757
    East_Bounding_Coordinate: -88.756270
    North_Bounding_Coordinate: 30.118912
    South_Bounding_Coordinate: 29.552397
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 17-Jun-2015
    Ending_Date: 24-Jun-2015
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: multimedia presentation
  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 (169 (15BIM01) 143 (15BIM02) 170 (15BIM03))
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 16
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -87.0
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 500000.0
      False_Northing: 0.0
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.6096
      Ordinates (y-coordinates) are specified to the nearest 0.6096
      Planar coordinates are specified in Meter
      The horizontal datum used is D WGS 1984.
      The ellipsoid used is WGS 1984.
      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?
    15BIM01_SBB_Tracklines.shp 15BIM02_SBB_Tracklines.shp 15BIM03_SBB_Tracklines.shp
    Esri shapefile containing the survey tracklines for the single-beam bathymetry data collected during USGS survey 2015-317-FA in June 2015 of the Chandeleur Islands, Louisiana. (Source: USGS)
    FID
    Internal feature number. (Source: Esri) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: Esri) Polyline ZM is the geometry type defining the features.
    Length_m
    Length in meters of trackline (Source: Esri)
    Range of values
    Minimum:0.64 (15BIM01) 1.86 (15BIM02) 0.27 (15BIM03)
    Maximum:14,477.00(15BIM01) 8,342.57 (15BIM02) 16,319.30(15BIM03)
    Units:Meters
    Resolution:0.1

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • U.S. Geological Survey
  2. Who also contributed to the data set?
    U.S. Geological Survey, Coastal and Marine Geology Program, St. Petersburg Coastal and Marine Science Center (SPCMSC).
  3. To whom should users address questions about the data?
    Cherokee Nation Technologies/U.S. Geological Survey
    Attn: Chelsea A. Stalk
    Researcher I
    600 4th Street South
    St. Petersburg, FL
    USA

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

Why was the data set created?

This zip file contains Esri trackline vector files for all single-beam bathymetry data collected during FAN 2015-317-FA, which encompasses data from three separate survey platforms; the R/V Sallenger (15BIM01), R/V Jabba Jaw (15BIM02), and R/V Chum (15BIM03).

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: 2016 (process 1 of 2)
    Acquisition: The trackline positions for USGS Cruise 2015-317-FA were acquired using Ashtech Proflex GPS receiver units streaming position data to the hydrographic software, HYPACK®, a marine surveying, positioning, and navigation software package that managed planned line information and provided real-time navigation, steering, correction, data quality, and instrumentation-status information to the boat operator (HYPACK® version 14.0.9.47 for 15BIM01, 15BIM02 and version 13.0.09.17 for 15BIM03 respectively). All platforms were equipped with Ashtech Proflex GPS receivers recording 12-channel full-carrier-phase positioning signals (L1/L2) from satellites via Thales Choke-ring antennas (15BIM01, 15BIM02) and smaller Ashtech Global Navigation Satellite Systems (GNSS) antenna (15BIM03). All navigation information was saved into a single raw data file (.raw) in HYPACK®, with each device string referenced by a device identification code and time stamped to Coordinated Universal Time (UTC). Person who carried out this activity:
    Cherokee Nation Technologies/U.S. Geological Survey
    Attn: Chelsea A. Stalk
    Researcher I
    600 4th Street South
    St. Petersburg, FL
    U.S.

    (727) 502-8000 (voice)
    cstalk@usgs.gov
    Date: 2016 (process 2 of 2)
    Processing/Shape file creation: The trackline vector file was created in Esri ArcGIS version 10.2.2.3552 using the XTools Pro extension, version 11.0 build 1328. The trackline shapefile was created from the x,y,z point data shapefile, using the XTools' feature conversion tool, "make polylines from points". Within XTools' feature conversion selection window, the following items were selected. The "group by field selection" was set to use the HYPACK line name attribute and the "input feature order - order by field" was set to use the FID attribute. The resultant polyline shapefile was then projected in WGS84 Universal Transverse Mercator (UTM) Zone 16 North. Person who carried out this activity:
    Cherokee Nation Technologies/U.S. Geological Survey
    Attn: Chelsea A. Stalk
    Researcher I
    600 4th Street South
    St. Petersburg, FL
    U.S.

    (727) 502-8000 (voice)
    cstalk@usgs.gov
    Data sources used in this process:
    • 15BIM01_SBB_1039_ITRF00_shape.shp 15BIM02_SBB_1039_ITRF00_shape.shp 15BIM03_SBB_1039_ITRF00_shape.shp
    Data sources produced in this process:
    • 15BIM01_SBB_Tracklines.shp 15BIM02_SBB_Tracklines.shp 15BIM03_SBB_Tracklines.shp
  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?
    No formal attribute accuracy tests were conducted.
  2. How accurate are the geographic locations?
    An Ashtech GPS receiver on all survey platforms recorded the 12-channel full-carrier-phase positioning signals (L1/L2) from satellites via a Thales choke-ring antenna (15BIM01,15BIM02) and from smaller Global Ashtech Global Navigation Satellite Systems (GNSS) antennas (15BIM03). The manufacturer's stated accuracy of the post processed kinematic GPS data is +/- 1 centimeter (cm) in the Horizontal plane.
  3. How accurate are the heights or depths?
    The survey tracklines do not include or represent vertical data.
  4. Where are the gaps in the data? What is missing?
    This dataset is considered complete for the information presented, as described in the abstract section. Users are advised to read the rest of the metadata record carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    These datasets are from one field activity with consistent instrument calibrations.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: none
Use_Constraints:
The U.S. Geological Survey requests that it be referenced as the originator of this dataset in any future products or research derived from these data. These data should not be used for navigational purposes.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey
    600 4th Street South
    St. Petersburg, FL
    U.S.

    (727) 502-8000 (voice)
    cstalk@usgs.gov
  2. What's the catalog number I need to order this data set? 15BIM01_SBB_Tracklines.shp, 15BIM02_SBB_Tracklines.shp, 15BIM03_SBB_Tracklines.shp
  3. What legal disclaimers am I supposed to read?
    This publication was prepared by an agency of the United States Government. Although these data have been 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. Is there some other way to get the data?
    none
  6. What hardware or software do I need in order to use the data set?
    This shapefile was created for use with Esri ArcGIS software. It may also be viewed with Esri public domain software ArcExplorer or other GIS software capable of importing the data.

Who wrote the metadata?

Dates:
Last modified: 20-Mar-2019
Metadata author:
Cherokee Nation Technologies/U.S. Geological Survey
Attn: Chelsea A. Stalk
Researcher I
600 4th Street South
St. Petersburg, FL
U.S.

(727) 502-8000 (voice)
cstalk@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/2015-317-FA_SBB_Tracklines_metadata.faq.html>
Generated by mp version 2.9.49 on Wed Mar 20 17:48:04 2019