Wave Scenario Grid with Proposed Sediment Borrow Pit 3 of Breton Island, Louisiana: Model Input Grid 4 with Pit 3 Configuration

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Frequently anticipated questions:

What does this data set describe?

Title:
Wave Scenario Grid with Proposed Sediment Borrow Pit 3 of Breton Island, Louisiana: Model Input Grid 4 with Pit 3 Configuration
Abstract:
The Simulating WAves Nearshore (SWAN) wave model input grid 4 bathymetry with pit 3 configuration (G4_P3_grid.shp) and output of significant wave height, dominant wave period, and mean wave direction resulting from simulation of wave scenarios at Breton Island, LA, as described in USGS Open-File Report 20151055 are provided here.
Supplemental_Information:
There were 128 individual scenarios ran, which were based on significant wave height (H) and mean wave direction (D). Significant wave height was included in eight bins (H1-H8) that ranged from 0 to 6 meters (m), in intervals of 0.5 m and 1 m. There were 16 bins for mean wave direction (D1-D16) that ranged between 0–360 degrees, in intervals of 22.5 degrees. Of the 128 scenarios, 12 were run where no events were observed so these were excluded from the data release.
  1. How might this data set be cited?
    Mickey, Rangley C., Dalyander, P. Soupy, Long, Joseph W., and Flocks, James G., 20170627, Wave Scenario Grid with Proposed Sediment Borrow Pit 3 of Breton Island, Louisiana: Model Input Grid 4 with Pit 3 Configuration: U.S. Geological Survey Data Release doi:10.5066/F7ZC81B1, U.S. Geological Survey, St. Petersburg, FL.

    Online Links:

    This is part of the following larger work.

    Dalyander, P. Soupy, Mickey, Rangley C., Long, Joseph W., and Flocks, James G., 20150514, Effects of Proposed Sediment Borrow Pits on Nearshore Wave Climate and Longshore Sediment Transport Rate Along Breton Island, Louisiana: Open-File Report (OFR) 2015-1055, U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -89.2322136333544
    East_Bounding_Coordinate: -89.0421633798571
    North_Bounding_Coordinate: 29.5224253171759
    South_Bounding_Coordinate: 29.4216387757958
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 10-Jul-2014
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: Vector Digital Data Set (Polygon)
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      Indirect_Spatial_Reference: Gulf of Mexico
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-Polygon (552178)
    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 0.0197905672. Longitudes are given to the nearest 0.0226044823. Latitude and longitude values are specified in Decimal seconds. 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.
      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Datum_Name: North American Vertical Datum of 1988
      Altitude_Resolution: 0.01 m
      Altitude_Distance_Units: meters
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates
  7. How does the data set describe geographic features?
    G4_P3_grid
    Model grid used in hydrodynamic calculations of wave scenarios. (Source: USGS)
    FID
    Internal feature number. (Source: Esri) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: Esri) Coordinates defining the features.
    Depth
    SWAN wave model input grid 4 with pit 3 configuration depths, in meters. (Source: USGS)
    Range of values
    Minimum:0.000652
    Maximum:13.976125

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Rangley C. Mickey
    • P. Soupy Dalyander
    • Joseph W. Long
    • James G. Flocks
  2. Who also contributed to the data set?
    U.S. Geological Survey
  3. To whom should users address questions about the data?
    U.S. Geological Survey, USGS Southeast Area
    Attn: P. Soupy Dalyander
    Research Oceanographer
    600 4th Street South
    St. Petersburg, FL
    US

    727-502-8124 (voice)
    727-502-8001 (FAX)
    sdalyander@usgs.gov

Why was the data set created?

This geographic information system (GIS) layer contains the model grid used for the calculation of waves in the wave climate scenarios used to investigate hydrodynamic variability in the northern Gulf of Mexico. This data layer is intended to illustrate the nested model grid G4 (designated with P1 for pit 1, P2 for pit 2, or P3 for pit 3) over which calculations were performed. The analysis results, which are contained in other data layers, are only presented at those locations where model outputs exist (for example, "wet" grid cells, as opposed to "dry" grid cells in the model representing land).

How was the data set created?

  1. From what previous works were the data drawn?
    NGDC NGC (source 1 of 3)
    NOAA National Geophysical Data Center (NGDC), 2012, Northern Gulf Coast, FL/LA/MS/AL 1 arc-second NAVD 88 DEM: NOAA National Geophysical Data Center (NGDC), Boulder, CO.

    Online Links:

    Type_of_Source_Media: online
    Source_Contribution:
    NOAA's Northern Gulf Coast DEM bathymetric data (NGDC NGC). This dataset was combined with others below and interpolated to grid cell locations and used to generate model bathymetry for grid G4.
    BICM 2007 (source 2 of 3)
    University of New Orleans Pontchartrain Institute for Environmental Sciences and U.S. Geological Survey, 2009, Louisiana Barrier Island Comprehensive Monitoring Program (BICM) Volume 3: Bathymetry and Historical Seafloor Change 1869-2007.: Pontchartrain Institute Reports and Studies, New Orleans, LA.

    Online Links:

    Type_of_Source_Media: online
    Source_Contribution:
    Bathymetric data collected by University of New Orleans and U.S. Geological Survey in 2007 as part of the Barrier Island Comprehensive Monitoring program (BICM 2007). This dataset was combined with others and interpolated to grid cell locations and used to generate model bathymetry for grid G4.
    BRETON2014 (source 3 of 3)
    U.S. Geological Survey, 2016, Archive of Bathymetry and Backscatter Data Collected in 2014 Nearshore Breton and Gosier Islands, Breton National Wildlife Refuge, Louisiana: U.S. Dept of Interior, St. Petersburg, FL.

    Online Links:

    Type_of_Source_Media: digital
    Source_Contribution:
    2014 Bathymetric/Topographic data (BRETON2014). This dataset was combined with others above and interpolated to grid cell locations and used to generate model bathymetry for grid G4.
  2. How were the data generated, processed, and modified?
    Date: 2014 (process 1 of 2)
    The scale-controlled interpolation routine documented by Plant and others, 2002, was used to merge and interpolate the Northern Gulf Coast DEM (NGDC NGC), BICM 2007 bathymetric data and the 2014 Breton Island topographic/bathymetric lidar (BRETON2014) onto the model grid using Matlab R2015. Person who carried out this activity:
    Joseph Long
    U.S. Geological Survey
    Oceanographer
    600 4th Street S
    St. Petersburg, FL
    USA

    727-502-8124 (voice)
    727-502-8001 (FAX)
    jwlong@usgs.gov
    Data sources used in this process:
    • NGDC NGC
    • BICM 2007
    • BRETON2014
    Data sources produced in this process:
    • G4BATHY
    Date: 13-Oct-2020 (process 2 of 2)
    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?
    Love, M.R., Amante, C.J., Eakins, B.W., Taylor, L.A., 2012, Digital Elevation Models of the Northern Gulf Coast: Procedures, Data Sources and Analysis: NOAA Technical Memorandum NESDIS NGDC-59, U.S. Dept. of Commerce, Boulder, CO.

    Online Links:

    Plant, N.G., Holland, K.T., Puleo, J.A., 2002, Analysis of the scale of errors in nearshore bathymetric data: 191 1-2, Marine Geology, online.

    Online Links:

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

  1. How well have the observations been checked?
    This data layer contains the grid over which hydrodynamic wave scenario results were calculated. These coordinates are in latitude and longitude for this data layer.
  2. How accurate are the geographic locations?
    This layer contains the model grid over which hydrodynamic wave scenario results were calculated. Within the SWAN model, these coordinates are in UTM, which have been converted into latitude and longitude for this data layer.
  3. How accurate are the heights or depths?
    Vertical datum is the North American Vertical Datum of 1988 (NAVD88) with an estimated resolution of 0.01 m.
  4. Where are the gaps in the data? What is missing?
    This layer contains the complete model grid (including wet and dry, for example, land, grid cells) used for calculation of wave scenario hydrodynamic results.
  5. How consistent are the relationships among the observations, including topology?
    No duplicate features are present. All polygons are closed, and all lines intersect where intended. No undershoots (lines falling short of the line they should intersect to form the polygon) or overshoots (lines crossing over the line they should intersect to form the polygon) are present.

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:
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey, USGS Southeast Area
    Attn: P. Soupy Dalyander
    Research Oceanographer
    600 4th Street South
    St. Petersburg, FL
    US

    727-502-8124 (voice)
    727-502-8001 (FAX)
    sdalyander@usgs.gov
  2. What's the catalog number I need to order this data set? G4_P3_Grid.shp
  3. What legal disclaimers am I supposed to read?
    This digital 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. What hardware or software do I need in order to use the data set?
    These data are available in Environmental Systems Research Institute (Esri) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing the data. A free data viewer, ArcExplorer, capable of displaying the data is available from Esri at www.esri.com.

Who wrote the metadata?

Dates:
Last modified: 13-Oct-2020
Metadata author:
P. Soupy Dalyander
U.S. Geological Survey, USGS Southeast Area
Research Oceanographer
600 4th Street South
St. Petersburg, FL
US

727-502-8124 (voice)
727-502-8001 (FAX)
sdalyander@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/G4_grid.faq.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:18:49 2021