Dauphin Island Decadal Hindcast Model Inputs and Results: Final DEM

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Frequently anticipated questions:

What does this data set describe?

Title:
Dauphin Island Decadal Hindcast Model Inputs and Results: Final DEM
Abstract:
The model output of bathymetry and topography values resulting from a deterministic simulation at Dauphin Island, Alabama, as described in USGS Open-File Report 2019–1139 (https://doi.org/10.3133/ofr20191139), are provided here. For further information regarding model input generation and visualization of model output topography and bathymetry refer to Mickey and others (2020).
  1. How might this data set be cited?
    Mickey, Rangley C., Jenkins, Robert L. III, Dalyander, P. Soupy, Thompson, David, Plant, Nathaniel, and Long, Joseph, 20200228, Dauphin Island Decadal Hindcast Model Inputs and Results: Final DEM: U.S. Geological Survey Data Release doi:10.5066/P91ALL6C, U.S. Geological Survey, St. Petersburg, FL.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -88.4755524520560
    East_Bounding_Coordinate: -87.6711236123306
    North_Bounding_Coordinate: 30.6940751670340
    South_Bounding_Coordinate: 29.9718025521135
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 17-Sep-2004
    Ending_Date: 01-Jan-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?
      Indirect_Spatial_Reference: Gulf of Mexico
      This is a Raster data set. It contains the following raster data types:
      • Dimensions 1367 x 656 x 1, type Grid cell
    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: 0.999600
      Longitude_of_Central_Meridian: -87.000000
      Latitude_of_Projection_Origin: 0.000000
      False_Easting: 500000.000000
      False_Northing: 0.000000
      Planar coordinates are encoded using Row and Column
      Abscissae (x-coordinates) are specified to the nearest 1
      Ordinates (y-coordinates) are specified to the nearest 1
      Planar coordinates are specified in meters
      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodectic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.25722210100002.
      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Datum_Name: North American Vertical Datum of 1988
      Altitude_Resolution: 0.0001
      Altitude_Distance_Units: meters
      Altitude_Encoding_Method: attribute values
  7. How does the data set describe geographic features?
    Entity_and_Attribute_Overview:
    The CF-compliant metadata in the header of the NetCDF file provides spatial information for projecting the data into a geographic information system. It also provides information about the conventions used for attributes in the dataset.
    Entity_and_Attribute_Detail_Citation:
    The entity and attribute information were generated by the individual and/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)
    • Rangley C. Mickey
    • Robert L. Jenkins III
    • P. Soupy Dalyander
    • David Thompson
    • Nathaniel Plant
    • Joseph Long
  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, Southeast Region
    Attn: Nathaniel G Plant
    Research Oceanographer
    600 4Th Street South
    St. Petersburg, FL
    United States

    727-502-8072 (voice)
    nplant@usgs.gov

Why was the data set created?

These data were generated for the Delft 3D, EDGR, and XBeach model to indicate how Dauphin Island evolved over the span of approximately 10 years. The model-derived topographic and bathymetric digital elevation model (DEM) is included in the download file, Final_Model_DEM.zip as a Network Common Data Form (NetCDF) file. This dataset consists of Federal Geographic Data Committee (FGDC) metadata and a NetCDF file containing the following variables: coordinates of the model grid (Easting and Northing) and the final bathymetry/topography elevation (z) model grid.

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: 2018 (process 1 of 3)
    The hindcast model simulates morphologic change that results from hydrodynamic impacts and sediment transport with Delft 3D, XBeach, and an empirical dune growth model (EDGR). The Delft 3D modelling portion was set up following the description provided in Jenkins and others (2020). Following the steps provided in the XBeach user manual (https://xbeach.readthedocs.io/en/latest/user_manual.html), the model was set up using a params.txt file. Significant wave heights, peak wave periods, and water levels were provided from the synthetic storm scenario described in OFR 2019-1139 by Mickey and others (2020). The EDGR dune growth model was executed between the Delft 3D and XBeach model simulations and the model was set up following the description in Mickey and others (2020). The resulting topographic and bathymetric elevations, extracted at the end of each scenario, were output into netCDF files. Person who carried out this activity:
    Rangley Mickey
    U.S. Geological Survey
    Oceanographer
    600 4th Street S
    St. Petersburg, Florida
    USA

    (727)-502-8115 (voice)
    Date: 2018 (process 2 of 3)
    Model bathymetric and topographic outputs were extracted in Mathworks MATLAB (R2016b) with functions included in the OpenEarth toolbox (provided by Deltares at, https://publicwiki.deltares.nl/display/OET/Tools). The resulting bathymetric and topographic elevations from the model grid were then packaged into a NetCDF file, using the export functions available in MATLAB, for inclusion in this data release. Person who carried out this activity:
    Rangley Mickey
    U.S. Geological Survey
    Oceanographer
    600 4th Street South
    Saint Petersburg, Florida

    727-502-8115 (voice)
    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?
    Mickey, R.C., Long, J.W., Dalyander, P.S., Jenkins, R.L., III, Thompson, D.M., Passeri, D.L., and Plant, N.G., 2020, Development of a Modeling Framework for Predicting Decadal Barrier Island Evolution: U.S. Geological Survey Open-File Report 2019-1139, U.S. Geological Survey, Reston, VA.

    Online Links:

    Jenkins, R.L., III, Long, J.W., Dalyander, P.S., Thompson, D.M., and Mickey, R.C.,, 2020, Development of a Process-Based Littoral Sediment Transport Model for Dauphin Island, Alabama: U.S. Geological Survey Open-File Report 2020-1011, U.S. Geological Survey, Reston, VA.

    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?
    This DEM contains the final model topographic and bathymetric elevations. Within the Delft 3D, EDGR, and XBeach models, the coordinates are in Universal Transverse Mercator (UTM) Zone 16 North.
  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 meters (m).
  4. Where are the gaps in the data? What is missing?
    This DEM contains the complete final model grid elevation. 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?
    The final DEM illustrates the hindcast model-derived topographic and bathymetric elevations in all model grid cells.

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, Southeast Region
    Attn: Nathaniel G Plant
    Research Oceanographer
    600 4Th Street South
    St. Petersburg, FL
    United States

    727-502-8072 (voice)
    727-502-8182 (FAX)
    nplant@usgs.gov
  2. What's the catalog number I need to order this data set? Final_DEM.nc
  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?
    • Availability in digital form:
      Data format: Final_DEM.nc is a NetCDF file that contains the final model topographic and bathymetric elevations and coordinate information, in meters. in format NetCDF (version NetCDF version 4.3.3.1)
      Network links: https://coastal.er.usgs.gov/data-release/doi-P91ALL6C/data/Final_Model_DEM.zip
    • Cost to order the data: None. No fees are applicable for obtaining the dataset.

Who wrote the metadata?

Dates:
Last modified: 13-Oct-2020
Metadata author:
Rangley C Mickey
U.S. Geological Survey, Southeast Region
Oceanographer
600 4Th Street South
St. Petersburg, FL
United States

727-502-8115 (voice)
727-502-8182 (FAX)
rmickey@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/Final_DEM_metadata.faq.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:18:49 2021