14BIM03_SBB_tracklines: Shapefile of the Single-beam Bathymetry Tracklines Surveyed in 2014 near Breton Island, Louisiana

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Frequently anticipated questions:


What does this data set describe?

Title:
14BIM03_SBB_tracklines: Shapefile of the Single-beam Bathymetry Tracklines Surveyed in 2014 near Breton Island, Louisiana
Abstract:
As part of the Barrier Island Monitoring Project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted nearshore geophysical surveys off Breton and Gosier Islands, Louisiana, in July and August of 2014. To assist the United States Fish and Wildlife Service (USFWS) with restoration planning efforts, the USGS was tasked with answering fundamental questions about the physical environment of the southern Chandeleur Islands, including the geology, morphology, and oceanography. Baseline data needed to answer these questions was either insufficient or missing in the area. The USGS conducted a comprehensive geologic investigation in the summer of 2014 by collecting geophysical and sedimentological data. Breton Island, located at the southern end of the Chandeleur Island chain, Louisiana, was recognized as a natural and globally important nesting sanctuary for several bird species and was established as the Breton National Wildlife Refuge (NWR) in 1904. The aerial extent of Breton Island has diminished 90% since 1920. Land loss is attributed to ongoing relative sea-level rise, diminished sediment supply, and storm impacts. The bird population on Breton Island has also declined over the years, most notably after Hurricane George in 1998 and Hurricane Katrina in 2015, which completely submerged the island. Despite the decreasing habitable acreage, migratory seabirds continue to return and utilize Breton Island. To prevent the island from being completely submerged in the future and to protect, stabilize, and provide more nesting and foraging areas for the birding population, the USFWS is proposing a restoration effort to rebuild Breton Island to its pre-Katrina footprint. This Data Series serves as an archive of processed interferometric-swath, single-beam bathymetry, and side-scan sonar data collected in the nearshore of Breton and Gosier Islands, NWR, Louisiana. The data were collected during two USGS cruises (USGS Field Activity Numbers 2014-314-FA and 2014-317-FA) in July and August 2014. Geographic Information System data products include a 100 meter-cell-size interpolated bathymetry grid surface, trackline maps, and point data files. Additional files include error analysis maps, Field Activity Collection System logs, and formal Federal Geographic Data Committee (FGDC) metadata.
Supplemental_Information:
Trackline files were recorded at the time of the survey using HYPACK version 14.0.9.47 marine surveying, positioning, and navigation software.
  1. How might this data set be cited?
    U.S. Geological Survey, 2016, 14BIM03_SBB_tracklines: Shapefile of the Single-beam Bathymetry Tracklines Surveyed in 2014 near Breton Island, Louisiana:.

    Online Links:

    This is part of the following larger work.

    DeWitt, Nancy T., Fredericks, Jake J., Flocks, James G., Miselis, Jennifer L., Locker, Stanley D., Kindinger, Jack L., Bernier, Julie C., Kelso, Kyle W., Reynolds, B.J., Wiese, Dana S., and Browning, Trevor, 2015, Archive of bathymetry and backscatter data collected in 2014 nearshore Breton and Gosier Islands, Breton National Wildlife Refuge, Louisiana.: U.S. Geological Survey Data Series 1005, U.S. Geological Survey, St. Petersburg, Florida.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -89.253810
    East_Bounding_Coordinate: -89.030282
    North_Bounding_Coordinate: 29.596540
    South_Bounding_Coordinate: 29.436913
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2014
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: vector digital data
  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 (278)
    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?
    14BIM03_SBB_tracklines.shp
    Esri shapefile containing the survey tracklines for the single-beam bathymetry data collected during USGS cruise 14BIM03 in July 2014 around the southern 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.
    HypackLine
    String (Source: HYPACK) Line number in survey generated by HYPACK, which is prefaced with the USGS Field Activity Number (FAN) 14BIM03.
    DOY
    String (Source: Esri)
    Range of values
    Minimum:195
    Maximum:209
    Units:Day of year of 2014 the line was surveyed
    Year
    String (Source: Esri) Year survey completed
    Lenth_m
    Length of survey line, in meters (Source: Esri)
    Range of values
    Minimum:0.717
    Maximum:10168.85
    Units:meters
    Resolution:0.01

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?
    Funds for this report are part of project funds for the Louisiana Outer Coast Early Restoration Project, obtained by the natural resource trustees for the Deepwater Horizon Oil Spill, pursuant to the Framework for Early Restoration Addressing Injuries Resulting from the Deepwater Horizon Oil Spill executed April 20, 2011. USFWS is the project lead for the North Breton Island Barrier Island Restoration project. Acknowledgment of the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, as a data source would be appreciated in products developed from these data, and such acknowledgment as is standard for citation and legal practices. Sharing of new data layers developed directly from these data would also be appreciated by the U.S. Geological Survey staff. Users should be aware that comparisons with other datasets for the same area from other time periods may be inaccurate, due to inconsistencies resulting from changes in photointerpretation, mapping conventions, and digital processes over time. These data are not legal documents and are not to be used as such.
  3. To whom should users address questions about the data?
    U.S. Geological Survey
    Attn: Nancy T. DeWitt
    Geologist
    600 4th Street South
    St. Petersburg, FL
    US

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

Why was the data set created?

This zip archive contains the survey tracklines in Esri shapefile format for the single-beam bathymetry data collected in July 2014 around the southern Chandeleur Islands, Louisiana.

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: 2014 (process 1 of 2)
    Acquisition: The trackline positions for USGS Cruise 14BIM02 were acquired using an Ashtech ProFlex 800 GPS receiver unit streaming position data to the hydrographic software HYPACK version 13.0.9.17. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Nancy T. DeWitt
    Geologist
    600 4th Street South
    St. Petersburg, FL
    U.S.

    (727) 502-8000 (voice)
    ndewitt@usgs.gov
    Date: 2014 (process 2 of 2)
    The trackline file was created in Esri ArcGIS version 10.2.2.3552 using the XTools Pro extension, version 11.1. 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:
    U.S. Geological Survey
    Attn: Nancy T. DeWitt
    Geologist
    600 4th Street South
    St. Petersburg, FL
    U.S.

    (727) 502-8000 (voice)
    ndewitt@usgs.gov
    Data sources used in this process:
    • 14BIM03_SBB_Level_03_xxx_ITRF00.shp
    Data sources produced in this process:
    • 14BIM03_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?
    The positional accuracy of the tracklines is determined by the accuracy of the processed GPS position data. The tracklines represent the data coverage extent for the single-beam bathymetry survey for USGS cruise 14BIM03.
  2. How accurate are the geographic locations?
    An Ashtech ProFlex 800 GPS receiver on the survey boat recorded the 12-channel full-carrier-phase positioning signals (L1/L2) from satellites via a Magellan GNSS antenna. The manufacturer's stated accuracy of the processed kinematic GPS data is 1 to 2 centimeters (cm). The raw trackline position data were recorded using HYPACK version 13.0.9.17 marine surveying, positioning, and navigation software.
  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 is a complete survey trackline dataset for the single-beam bathymetry data collected during USGS Cruise 14BIM03 in July 2014 from the southern Chandeleur Islands.
  5. How consistent are the relationships among the observations, including topology?
    This zip archive contains the single-beam bathymetry survey tracklines, recorded at the time of data collection for USGS cruise 14BIM03 in July 2014. Field logs, vessel platform descriptions, and other survey information are available at, http://pubs.usgs.gov/ds/1005/ds-logs.

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)
    ndewitt@usgs.gov
  2. What's the catalog number I need to order this data set? Downloadable data
  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: 19-Mar-2019
Metadata author:
U.S. Geological Survey
Attn: Nancy T. DeWitt
Geologist
600 4th Street South
St. Petersburg, FL
U.S.

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

This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/14BIM03_SBB_tracklines_metadata.faq.html>
Generated by mp version 2.9.49 on Tue Mar 19 18:45:19 2019