Edited 2015 shoreline shapefile for Ship, Horn, Petit Bois, Mississippi

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Frequently anticipated questions:

What does this data set describe?

Title:
Edited 2015 shoreline shapefile for Ship, Horn, Petit Bois, Mississippi
Abstract:
The 2015 Mississippi coastal shorelines were originally extracted from 2015 Landsat imagery and published within United States Geological Survey (USGS) Open-File Report (OFR) 2015-1179 (https://doi.org/10.3133/ofr20151179). Shoreline files for Ship, Horn, and Petit Bois Islands were merged to a single shapefile and spatially adjusted using 2015/2016 USGS bathymetric survey tracklines (Dewitt and others, 2017) to more closely match island shoreline positions during USGS surveys.
Supplemental_Information:
The 2015 shoreline file is relative to the Universal Transverse Mercator (UTM) zone 16N North American Datum of 1983 (NAD83) horizontal datum and North American Vertical Datum of 1988 (NAVD88) GEOID12B vertical datum.
  1. How might this data set be cited?
    Buster, Noreen A., Brenner, Owen T., and Flocks, James G., 20171121, Edited 2015 shoreline shapefile for Ship, Horn, Petit Bois, Mississippi: U.S. Geological Survey Data Release doi:10.5066/F7028QFV, U.S. Geological Survey, St. Petersburg, FL.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -88.987158
    East_Bounding_Coordinate: -88.511696
    North_Bounding_Coordinate: 30.25466286
    South_Bounding_Coordinate: 30.20691494
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 23-May-2015
    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 (4)
    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 North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257222101.
  7. How does the data set describe geographic features?
    2015_shoreline_ShipHorn.shp
    Esri polyline features representing revised 2015 Ship, Horn, and western Petit Bois Island, Mississippi shorelines. (Source: U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center)
    FID
    Internal feature number. (Source: Esri) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: Esri)
    ValueDefinition
    PolylineShape of feature.
    Name
    Island name for each shoreline segment (Source: USGS) Character string - Island name
    Elev_m
    vertical elevation value of 0.23 meters: tanken from operational MHW value published in Weber and others (2015). (Source: USGS)
    Range of values
    Minimum:0.23
    Maximum:0.23

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Noreen A. Buster
    • Owen T. Brenner
    • James G. Flocks
  2. Who also contributed to the data set?
    U.S. Geological Survey, Coastal and Marine Geology Program, St. Petersburg Coastal and Marine Science Center
  3. To whom should users address questions about the data?
    U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
    Attn: Noreen A. Buster
    600 4th Street South
    St. Petersburg, FL
    USA

    727-502-8114 (voice)
    nbuster@usgs.gov

Why was the data set created?

The 2015 shoreline files created for this study (2015_shoreline_ShipHorn.shp) was used as a clipping feature in creating the 2016 bathymetric triangular irregular network (TIN) and, therefore, included in the final digital elevation model (DEM) (2016_MS_NAD83NAVD88g12B_50m.tif) and 2016 bathymetric change maps (2016minus1916to1920_MS_NAD83NAVD88g12B_50m.tif and 2016minus2008to2009_MS_NAD83NAVD88g12B_50m.tif) within this data release.).

How was the data set created?

  1. From what previous works were the data drawn?
    shoreline (source 1 of 1)
    Guy, Kristy K., 20151013, Barrier Island Shorelines Extracted from Landsat Imagery: U.S. Geological Survey Open-File Report OFR 2015-1179, U.S. Geological Survey, Reston, VA.

    Online Links:

    Type_of_Source_Media: online
    Source_Contribution:
    The published 2015 Ship, Horn, and Petit Bois (western shoal only) shorelines were used to create the modified 2016 shoreline. Published 2015 shorelines used to create the shoreline used in this study are dated 05/13/2015 for Ship Island, 04/21/2015 for Horn Island, and 05/23/2015 for the western shoal of Petit Bois Island.
  2. How were the data generated, processed, and modified?
    Date: 2016 (process 1 of 2)
    Using the 2016 USGS bathymetric survey coverage as a guide (Dewitt and others, 2017), and assuming this bathymetric dataset spatially defines the subaerial extent of the nearshore, previously published 2015 shorelines (USGS OFR 2015-1179) for Ship Island (dated 05/13/2015), Horn Island (04/21/2015), and the western shoal of Petit Bois Island (05/23/2015) were manually adjusted landward to more closely represent island coverage during the 2016 bathymetric survey. The largest of this applied shift was approximately 70 m; however, most often the adjusted difference was less than 25 m. Person who carried out this activity:
    James G. Flocks
    U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
    600 4th Street South
    St. Petersburg, FL
    USA

    727-502-8000 (voice)
    jflocks@usgs.gov
    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?
    Weber, Kathryn M., List, Jeffrey H., and Morgan, Karen L.M., 2005, An Operational Mean High Water Datum for Determination of Shoreline Position from Topographic Lidar Data: U.S. Geological Survey Open-File Report OFR 2005-1027, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    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?
    The horizontal accuracy of the data is unknown.
  3. How accurate are the heights or depths?
  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?
    Variations in original Landsat image quality (see USGS OFR 2015-1179) and photography surface condition and tidal level may have affected the accuracy of the shorelines. Additionally, the 2015 shoreline was manually adjusted using the 2016 USGS bathymetric survey trackline positions (Flocks and others, 2018, DeWitt and others, 2017) to better represent the shoreline position during the 2016 bathymetry survey.

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. The USGS requests to be acknowledged as originator of these data in future products or derivative research.
  1. Who distributes the data set? (Distributor 1 of 1)
    Noreen A. Buster
    U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
    600 4th Street South
    St. Petersburg, FL
    USA

    727-502-8000 (voice)
    nbuster@usgs.gov
  2. What's the catalog number I need to order this data set? 2015_shoreline_ShipHorn.shp
  3. What legal disclaimers am I supposed to read?
    Although these data were processed successfully on a computer system at the USGS, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The USGS shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 13-Oct-2020
Metadata author:
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
Attn: Noreen A. Buster
600 4th Street South
St. Petersburg, FL
USA

727-502-8114 (voice)
nbuster@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/2015_shoreline_ShipHorn_metadata.faq.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:18:31 2021