Shapefile of the Single-beam Bathymetry Tracklines Surveyed in May-June, 2015 from Grand Bay Alabama/Mississippi

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Frequently anticipated questions:

What does this data set describe?

Title:
Shapefile of the Single-beam Bathymetry Tracklines Surveyed in May-June, 2015 from Grand Bay Alabama/Mississippi
Abstract:
As part of the Sea level and Storm Impacts on Estuarine Environments and Shorelines project (SSIEES), scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted a single-beam bathymetry survey within the estuarine, open bay and tidal creek environments of Grand Bay Alabama/Mississippi, in May-June 2015. The goal of the SSIEES project is to assess the physical controls of sediment and material exchange between wetlands and estuarine environments along the northern Gulf of Mexico, specifically Grand Bay AL/MS and Vermilion Bay, Louisiana, as well as along the US east coast in Chincoteague Bay Virginia/Maryland. The data included in this data release will provide baseline bathymetric information for future research investigating wetland/marsh evolution, sediment transport, recent and long term geomorphic change, and will support modeling of future changes in response to restoration and storm impacts. The survey area encompasses more than 40 square kilometers (km2) of Grand Bay’s incorporated waters. This data release archives processed single-beam bathymetry data, collected from May 28-June 3, 2015 (USGS Field Activity Number [FAN] 2015-315-FA). Geographic information system (GIS) data products include: a 10 and 30-meter cell size interpolated bathymetry grid, trackline maps, and point data files. Additional files include error analysis maps, Field Activity Collection System (FACS) logs, and formal Federal Geographic Data Committee (FGDC) metadata.
Supplemental_Information:
Trackline files were recorded at time of the survey using HYPACK version 13.0.09.17 (15CCT04, 15CCCT05) marine surveying, positioning, and navigation software. Within this document all platforms will be distinguished by FAN (15CCT04-RV Shark, 15CCT05-RV 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, 20161122, Shapefile of the Single-beam Bathymetry Tracklines Surveyed in May-June, 2015 from Grand Bay Alabama/Mississippi: U.S. Geological Survey Data Release doi:10.5066/F7NP22M2, U.S. Geological Survey, St. Petersburg, FL.

    Online Links:

    This is part of the following larger work.

    DeWitt, Nancy T., Stalk, Chelsea A., Smith, Christopher G., Locker, Stanley D., Fredericks, Jake J., McCloskey, Terrance A., and Wheaton, Cathryn J., 2016, Single-Beam Bathymetry Data Collected in 2015 from Grand Bay, Alabama/Mississippi: U.S. Geological Survey Data Series 1070, U.S. Geological Survey, St. Petersburg, Florida.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -88.412974
    East_Bounding_Coordinate: -88.311187
    North_Bounding_Coordinate: 30.409890
    South_Bounding_Coordinate: 30.340671
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 28-May-2015
    Ending_Date: 03-Jun-2015
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: raster 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 (281)
    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 WGS1984.
      The ellipsoid used is Ellipsoid_Name.
      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?
    Grand_Bay_2015_SBB_tracklines.shp
    Esri shapefile containing the survey tracklines for the single-beam bathymetry data collected during USGS cruise 2015-315-FA in May-June 2015 within Grand Bay Alabama/Mississippi. (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) Survey line number generated by HYPACK and prefaced with the informal vessel identifier (RV Shark = WVR1=15CCT05, RV Chum = WVR2 = 15CCT05).
    Length_m
    Length of survey line, in meters (Source: Esri)
    Range of values
    Minimum:0.503
    Maximum:14274.927
    Units:meters
    Resolution:0.01
    Length_km
    Length of survey line, in Kilometers (Source: Esri)
    Range of values
    Minimum:0.0005
    Maximum:14.27
    Units:kilometers
    Resolution:1.0
    FAN
    Field Activity Number specific to platform (Source: User) RV Shark = WVR1 = 15CCT05, RV Chum = WVR2 = 15CC05

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 (SPCMSC), St. Petersburg
  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, Grand_Bay_2015_SBB_tracklines.zip, contains Esri trackline vector files for all single-beam bathymetry data collected from May 28-June 3, 2015 under FAN 2015-315-FA, which encompasses data from two separate survey platforms; the RV Shark (15CCT04), and RV Chum (15CCT05), during the Grand Bay Alabama/Mississippi Survey. Additional survey details are available at https://cmgds.marine.usgs.gov/fan_info.php?fan=2015-315-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: 2015 (process 1 of 3)
    Acquisition: The trackline positions for USGS FAN 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 13.0.09.17). Both platforms were equipped with Ashtech Proflex GPS receivers recording 12-channel full-carrier-phase positioning signals (L1/L2) from satellites via Ashtech Global Navigation Satellite Systems (GNSS) antennas. 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:
    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: 2015 (process 2 of 3)
    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:
    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:
    • Grand_Bay_2015_SBB_NAD83_MLLW.txt
    Data sources produced in this process:
    • Grand_Bay_2015_SBB_tracklines.shp
    Date: 13-Oct-2020 (process 3 of 3)
    Added keywords section with USGS persistent identifier as theme keyword. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
  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 performed.
  2. How accurate are the geographic locations?
    An Ashtech Global Positioning System (GPS) receiver on all survey platforms recorded the 12-channel full-carrier-phase positioning signals (L1/L2) from satellites via Global Navigation Satellite Systems (GNSS) antenna. 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)
    ndewitt@usgs.gov
  2. What's the catalog number I need to order this data set? Grand_Bay_2015_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: 13-Oct-2020
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/Grand_Bay_2015_SBB_tracklines_Metadata.faq.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:18:49 2021