Elevation data for four sites in the coastal marsh at Grand Bay National Estuarine Research Reserve, Mississippi, from July 2018 through January 2020

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Frequently anticipated questions:

What does this data set describe?

Title:
Elevation data for four sites in the coastal marsh at Grand Bay National Estuarine Research Reserve, Mississippi, from July 2018 through January 2020
Abstract:
To better understand sediment deposition in marsh environments, scientists from the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center (USGS-SPCMSC) selected four study sites (Sites 5, 6, 7, and 8) along the Point Aux Chenes Bay shoreline of the Grand Bay National Estuarine Research Reserve (GNDNERR), Mississippi. These datasets were collected to serve as baseline data prior to the installation of a living shoreline (a subtidal sill). Each site consisted of five plots located along a transect perpendicular to the marsh-estuary shoreline at 5-meter (m) increments (5, 10, 15, 20, and 25 m from the shoreline). Each plot contained six net sedimentation tiles (NST) that were secured flush to the marsh surface using polyvinyl chloride (PVC) pipe. NST are an inexpensive and simple tool to assess short- and long-term deposition that can be deployed in highly dynamic environments without the compaction associated with traditional coring methods. The NST were deployed for three month sampling periods, measuring sediment deposition from July 2018 to January 2020, with one set of NST being deployed for six months. Sediment deposited on the NST were processed to determine physical characteristics, such as deposition thickness, volume, wet weight/dry weight, grain size, and organic content (loss-on-ignition [LOI]). For select sampling periods, ancillary data (water level, elevation, and wave data) are also provided in this data release. Data were collected during USGS Field Activities Numbers (FAN) 2018-332-FA (18CCT01), 2018-358-FA (18CCT10), 2019-303-FA (19CCT01, 19CCT02, 19CCT03, and 19CCT04, respectively), and 2020-301-FA (20CCT01). Additional survey and data details are available from the U.S. Geological Survey Coastal and Marine Geoscience Data System (CMGDS) at, https://cmgds.marine.usgs.gov/. Data collected between 2016 and 2017 from a related NST study in the GNDNERR (Middle Bay and North Rigolets) can be found at https://doi.org/10.5066/P9BFR2US. Please read the full metadata for details on data collection, dataset variables, and data quality.
Supplemental_Information:
USGS scientists collected elevation data through quarterly field visits. Each field visit was assigned a FAN and sub-FAN by USGS staff. This publication contains data for field activities: 1) 2018-358-FA (18CCT10, October 2018), 2) 2019-303-FA (19CCT01, February 2019; 19CCT02, May 2019; 19CCT03, August 2019; 19CCT04, November 2019), 3) 2020-301-FA (20CCT01, January 2020). Elevation data were collected and processed by the Grand Bay National Estuarine Research Reserve staff. This dataset, Grand_Bay_Elevation_Data.csv, was acquired in the North American Datum of 1983 State Plane Mississippi East Federal Information Processing Standard 2301 (NAD_1983_StatePlane_Mississippi_East_FIPS_2301) and transformed into the North American Datum of 1983 Universal Transverse Mercator Zone 16 North (NAD_1983_UTM_Zone_16N).
  1. How might this data set be cited?
    Smith, Kathryn E.L., Terrano, Joseph F., Pitchford, Jonathan, and Brochard, Michael, 20200713, Elevation data for four sites in the coastal marsh at Grand Bay National Estuarine Research Reserve, Mississippi, from July 2018 through January 2020:.

    This is part of the following larger work.

    Smith, Kathryn E.L., Terrano, Joseph F., Pitchford, Jonathan, Brochard, Michael, Vargas, Joseph M., Atchia, Isabelle D., Everhart, Cheyenne S., and Smith, Christopher G., 20200713, Shore proximal marsh sediment deposition and ancillary data from Grand Bay National Estuarine Research Reserve, Mississippi, from July 2018 to January 2020: U.S. Geological Survey Data Release doi:10.5066/P9ONI8PS, U.S. Geological Survey, St. Petersburg, FL.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -88.449757
    East_Bounding_Coordinate: -88.396209
    North_Bounding_Coordinate: 30.429843
    South_Bounding_Coordinate: 30.335728
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 23-Oct-2018
    Ending_Date: 28-Jan-2020
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: Tabular digital data
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Point data set.
    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_North_American_1983.
      The ellipsoid used is GRS_1980.
      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?
    Grand_Bay_Elevation_Data.csv
    CSV file containing attribute information associated with location and elevation data collected in Grand Bay, Mississippi during 2018, 2019, and 2020. (Source: USGS)
    Sample_ID
    Sample identification number (Source: USGS) Character string. Sample IDs listed within the table used the naming convention FAN-GBXYY-ZZ, where FAN represents the USGS abbreviated field activity number (18CCT10, 19CCT01, 19CCT02, 19CCT03, 19CCT04 and 20CCT01), GB denotes samples are from Grand Bay, X is the site number (1,2, 3, 5, 6, 7, or 8), YY is the sample number, ZZ denotes the code where the elevation was collected from (see "type" field). For example, sample ID "18CCT10-GB600-WLS" is from the 18CCT10 trip from Site 6 measuring the elevation of the base of the water level logger well. Some samples have further specified sample numbers that follow ZZ. These sample numbers are used to distinguish samples of the same type collected at a specific site. For example, "18CCT10-GB500-SL-01" is from the 18CCT10 trip from Site 5 measuring shoreline elevations, with this specific point being the first point collected. GPS positions outside of net sedimentation tile sites are called "Site 0". No data was collected at Site 4.
    FAN
    USGS field activity number (FAN) assigned to each sample collection trip. (Source: USGS) Field activity numbers were assigned by the USGS to track field collection of samples. The FAN number consists of YYYY-XXX-FA, with YYYY being the 4-digit year, XXX being the trip number, and FA representing that it is a field activity. There are three FANs associated with this dataset: 2018-358-FA, 2019-303-FA and 2020-303-FA.
    Alt_FAN
    Alternate (abbreviated) FAN number assigned each collection trip. (Source: USGS) Alternate FAN numbers were assigned by the USGS and are YYCCTXX, where YY is the 2-digit year, CCT stands for coastal change and transport, and XX is the trip number. For example, 20CCT01 was from 2020 sample collection trip 01.
    Site
    Site number. Site 0 was sites not regularly samples, Site 1-3 were from a previous NST study, no data was collected at Site 4 and Site 5-8 are current study Sites. (Source: USGS)
    Range of values
    Minimum:0
    Maximum:8
    Date
    Date the elevations were collected from Grand Bay in YYYYMMDD format. (Source: USGS)
    Range of values
    Minimum:20181023
    Maximum:20200128
    Type
    Codes used to identify what object was measured for elevation. (Source: USGS)
    ValueDefinition
    NERRReference elevation collected at the Grand Bay NERR.
    WLTElevation at the top of the water level logger well.
    WLSSediment surface elevation at the base of the water level logger well.
    05TElevation at the 5-meter net sedimentation tile plot.
    10TElevation at the 10-meter net sedimentation tile plot.
    15TElevation at the 15-meter net sedimentation tile plot.
    20TElevation at the 20-meter net sedimentation tile plot.
    25TElevation at the 25-meter net sedimentation tile plot.
    ATElevation of the base of the In-Situ AquaTroll 600 sensor.
    ATTElevation of the top of the In-Situ AquaTroll 600 sensor.
    SLElevation of the shoreline.
    SLVElevation of the shoreline used for bathymetric verification.
    BOSElevation at the bottom of the shoreline scarp.
    TOSElevation at the top of the shoreline scarp.
    ETElevation profile transect that extends from the estuary into the marsh.
    SSurficial sediment sample collected at the net sedimentation tile plots.
    RBREstuary surface elevation at the RBRsolo3 sensor.
    Detail_name
    Detailed name of the sample. (Source: USGS) Detailed name of the sample that is represented in the "Type" column.
    SL_number
    Value used to order the shoreline elevation points as they were collected. (Source: USGS)
    Range of values
    Minimum:1
    Maximum:89
    Easting
    Easting coordinate of the elevation collection location in the North American Datum of 1983 (NAD83) Universal Transverse Mercator (UTM) Zone 16N projected coordinate system. (Source: USGS)
    Range of values
    Minimum:360665.1738
    Maximum:365854.2625
    Northing
    Northing coordinate of the elevation collection location in the North American Datum of 1983 (NAD83) Universal Transverse Mercator (UTM) Zone 16N projected coordinate system. (Source: USGS)
    Range of values
    Minimum:3356877.0908
    Maximum:3367281.8675
    Lat
    Latitude of the elevation collection location in the North American Datum of 1983 (NAD83). (Source: USGS)
    Range of values
    Minimum:30.33572199
    Maximum:30.42983734
    Long
    Longitude of the elevation collection location in the North American Datum of 1983 (NAD83). (Source: USGS)
    Range of values
    Minimum:-88.44975162
    Maximum:-88.39620335
    Elevation
    Elevation, in meters, in the North American Vertical Datum of 1988 (NAVD88) GEOID 12A. (Source: USGS)
    Range of values
    Minimum:-0.76196
    Maximum:8.15018
    Notes
    Notes about the GPS data collection. (Source: USGS) Values are errors or written locations of where the elevation measurement was collected.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Kathryn E.L. Smith
    • Joseph F. Terrano
    • Jonathan Pitchford
    • Michael Brochard
  2. Who also contributed to the data set?
    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. 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 St Petersburg Coastal and Marine Science Center
    Attn: Kathryn Smith
    Research Ecologist
    600 4th Street South
    St. Petersburg, FL

    727-502-8073 (voice)
    727-502-8182 (FAX)
    kelsmith@usgs.gov

Why was the data set created?

This data release contains elevation data for shorelines, net sedimentation tile plots, water level logger wells, and AquaTroll sensors. Elevation data can be used in conjunction with in-situ sedimentation data to track lateral erosion and accretion of the marsh and estuary surface. Elevation data were collected using a using a Trimble R10 Global Navigation Satellite System (GNSS) set to 1 second (s) continuous topology for shorelines and 10 s static occupations for all other data points. Data should not be used for navigational purposes.

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: 2020 (process 1 of 3)
    A Trimble R10 GNSS and TSC3 data collector were used to collect global positioning system (GPS) coordinates and elevations. Both the R10 and TSC3 were mounted onto a 2-m graphite rod with a mounted foot to keep the rod on the surface of the marsh. A projected coordinate system (NAD_1983_StatePlane_Mississippi_East_FIPS_2301) was used for data collection. The “Continuous Topo” tool was used when capturing shoreline features, so a point was collected every 5 s along the shoreline. Prior to point collection, the rod foot was placed on the marsh surface until the point was captured. Next the surveyor took 2–4 steps before setting the rod down for the next point to be captured, making sure to firmly seat the rod on the marsh platform prior to data capture. Shoreline points were collected from the vegetation line nearest to the erosional edge, which also represented the top of scarp (TOS). For other points collected (for example, bottom of scarp, NST plots, etc.), the “Measure Points” tool was used with an occupation time of 10 s for each point collected. To capture the position of NST plots, a point was taken on the outside edge of each PVC marker (each plot has two corner markers). GPS points for the TOS generally followed the vegetation line closest to the erosional edge. The bottom of scarp (BOS) generally followed the first slope break from the erosional edge. BOS, TOS, and tile plots (plots) were coded as such in the TSC3 during data collection to help identify geomorphic features when subsequently viewing or analyzing the data. Data were exported from the TSC3 as a shapefile (.shp). The .shp was pulled from the export folder and brought into ArcGIS software where the projection was defined as NAD_1983_StatePlane_Mississippi_East_FIPS_2301. Person who carried out this activity:
    Jonathan Pitchford
    Stewardship Coordinator
    6005 Bayou Heron Road
    Moss Point, MS
    USA

    228-523-4009 (voice)
    jonathan.pitchford@dmr.ms.gov
    Date: 2020 (process 2 of 3)
    Elevation data were sent to the USGS SPCMSC as ArcGIS shapefiles. Within ArcGIS, the data were reprojected from NAD_1983_StatePlane_Mississippi_East_FIPS_2301 into NAD_1983_UTM_Zone_16N, using the "project" tool. Data from all trips were merged into one shapefile and fields were then renamed for consistency with previous publications. The final shapefile was exported into tabular digital data (Comma Separated Values [CSV] format). Person who carried out this activity:
    Joseph Terrano
    Researcher III
    600 4th Street South
    St.Petersburg, FL
    USA

    727-502-8047 (voice)
    jterrano@contractor.usgs.gov
    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?
    Smith, Kathryn E.L., Terrano, Joseph F., Khan, Nicole S., and Stalk, Chelsea A., 2020, Shore Proximal Sediment Deposition, Elevation, Turbidity, and Water Level Data for Four Sites in the Coastal Marsh at Grand Bay National Estuarine Research Reserve, Mississippi, From October 2016 Through October 2017: U.S. Geological Survey, St. Petersburg, Florida.

    Online Links:

    Other_Citation_Details:
    Contains data from a related NST study in North Rigolets and Middle Bay areas of the GNDNERR.

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 sample locations has a horizontal error of +/-8 millimeters (mm) + 0.5 parts per million (ppm) root mean square (RMS) and a vertical error of +/-15 mm + 0.5 ppm RMS.
  2. How accurate are the geographic locations?
    +/-8 mm + 0.5 ppm RMS
  3. How accurate are the heights or depths?
    +/-15 mm + 0.5 ppm RMS
  4. Where are the gaps in the data? What is missing?
    This dataset includes the locations of 2,155 elevation points collected from shorelines, water level logger wells, AquaTroll sensors, RBR sensors, and net sedimentation tile study sites that were collected from Grand Bay Mississippi from October 2018 to January 2020 (USGS FANs 18CC10, 19CCT01, 19CCT02, 19CCT03, 19CCT04, and 20CCT01). 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 before using data. “No data” values are represented as blank cells and are intentionally left blank as there are no values associated with the data.
  5. How consistent are the relationships among the observations, including topology?
    Position and elevation data at each sample site were recorded with a Trimble R10 GNSS system set to 1 s continuous topo for shorelines and 10 s static occupations for all other data points. At the start of each survey a baseline mark was collected at the same location at the Grand Bay NERR headquarters.

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 to be acknowledged as originator of the data in future products or derivative research. This metadata record should be reviewed in its entirety to ensure specific data are suitable for other studies. These data should not be used for navigational purposes.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
    Attn: Kathryn Smith
    Research Ecologist
    600 4th Street South
    St. Petersburg, FL

    727-502-8073 (voice)
    727-502-8182 (FAX)
    kelsmith@usgs.gov
  2. What's the catalog number I need to order this data set? Grand_Bay_Elevation_Data.csv
  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?

Who wrote the metadata?

Dates:
Last modified: 13-Oct-2020
Metadata author:
U.S. Geological Survey St Petersburg Coastal and Marine Science Center
Attn: Joseph F. Terrano
Researcher III
600 4th Street South
St. Petersburg, FL

727-502-8047 (voice)
727-502-8182 (FAX)
jterrano@contractor.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_Elevation_Metadata_2018_2020.faq.html>
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