GIS Data: Sediment Sample Locations Collected from March 2012 to July 2013 from the Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Numbers 12BIM01, 12BIM02, 12BIM05, and 13BIM06)

Metadata also available as - [Outline] - [Parseable text] - [XML]

Frequently anticipated questions:

What does this data set describe?

Title:
GIS Data: Sediment Sample Locations Collected from March 2012 to July 2013 from the Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Numbers 12BIM01, 12BIM02, 12BIM05, and 13BIM06)
Abstract:
Scientists from the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center (SPCMSC) conducted a time-series collection of shallow sediment cores from the back-barrier environments along the Chandeleur Islands, Louisiana from March 2012 through July 2013. The sampling efforts were part of a larger USGS study to evaluate the effects on the geomorphology of the Chandeleur Islands following the construction of an artificial sand berm in response to the Deep Water Horizon oil spill. The objective of this study was to evaluate the response of the back-barrier tidal and wetland environments to the berm. This report serves as an archive for sedimentological, radiochemical, and microbiological data derived from the sediment cores. Data is available for a time-series of four sampling periods: March 2012; July 2013; September 2012; and July 2013. Data is available in downloadable spreadsheet, Joint Photographic Experts Group and Portable Document File formats. Additional files included: ArcGIS shape files of the study sites, detailed results of sediment grain size analyses, and formal Federal Geographic Data Committee (FDGC) metadata.
Supplemental_Information: None
  1. How might this data set be cited?
    Bernier, Julie C., 20131231, GIS Data: Sediment Sample Locations Collected from March 2012 to July 2013 from the Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Numbers 12BIM01, 12BIM02, 12BIM05, and 13BIM06):.

    Online Links:

    This is part of the following larger work.

    Marot, Marci E., Adams, C. Scott, Richwine, Kathyrn A., Smith, Christopher G., Osterman, Lisa E., and Bernier, Julie C., 20131231, Temporal Changes in Lithology and Radiochemistry from the Back-barrier Environments along the Chandeleur Islands, Louisiana: March 2012–July 2013: U.S. Geological Survey Open-File Report 2014-1079, U.S. Geological Survey, St. Petersburg, FL.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -88.83635
    East_Bounding_Coordinate: -88.82480
    North_Bounding_Coordinate: 29.96959
    South_Bounding_Coordinate: 29.89542
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 22-Mar-2012
    Ending_Date: 17-Jul-2013
    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):
      • Point (15)
    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 0.001
      Ordinates (y-coordinates) are specified to the nearest 0.001
      Planar coordinates are specified in meters
      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.
      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Datum_Name: North American Vertical Datum of 1988
      Altitude_Resolution: 0.001
      Altitude_Distance_Units: meters
      Altitude_Encoding_Method: Attribute values
  7. How does the data set describe geographic features?
    12BIM01_final_BB_GPS_4OFR.shp
    ESRI point shapefile representing the location of sediment samples collected in March 2012 from the northern Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Number 12BIM01) (Source: USGS)
    12BIM02_final_BB_GPS_4OFR.shp
    ESRI point shapefile representing the location of sediment samples collected in July 2012 from the northern Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Number 12BIM02) (Source: USGS)
    12BIM05_final_BB_GPS_4OFR.shp
    ESRI point shapefile representing the location of sediment samples collected in September 2012 from the northern Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Number 12BIM01) (Source: USGS)
    13BIM06_final_BB_GPS_4OFR.shp
    ESRI point shapefile representing the location of sediment samples collected in July 2013 from the northern Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Number 13BIM06) (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
    SITE
    Site identification number (Source: USGS) Character string
    LAT_NAD83
    Latitude of sample location in decimal degrees (NAD83) (Source: USGS)
    Range of values
    Minimum:29.89550
    Maximum:29.96950
    Units:decimal degrees
    Resolution:0.00001
    LON_dd
    Longitude of sample location in decimal degrees (NAD83) (Source: USGS)
    Range of values
    Minimum:-88.83583
    Maximum:-88.82502
    Units:decimal degrees
    Resolution:0.00001
    X__UTM16_m
    X-coordinate (easting) of sample location in meters (NAD83, UTM Zone 16N) (Source: USGS)
    Range of values
    Minimum:322818.425
    Maximum:323803.558
    Units:Meters
    Resolution:0.001
    Y_UTM16_m
    Y-coordinate (northing) of sample location in meters (NAD83, UTM Zone 16N) (Source: USGS)
    Range of values
    Minimum:3308611.746
    Maximum:3316818.387
    Units:Meters
    Resolution:0.001
    ELEV_G09_m
    Elevation of sample location in meters (NAVD88, GEOID09) (Source: USGS)
    Range of values
    Minimum:-0.792
    Maximum:1.152
    Units:Meters
    Resolution:0.001

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Julie C. Bernier
  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
    Attn: Marci Marot
    Geologist
    600 4th Street South
    St. Petersburg, FL
    USA

    (727) 502-8000 (voice)
    mmarot@usgs.gov

Why was the data set created?

This zip archive, GIS_Core_Locations.zip, includes the sample locations in ESRI shapefile format for sediment samples collected from March 2012 to July 2013 from the Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Numbers 12BIM01, 12BIM02, 12BIM05, and 13BIM06).

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: 2012 (process 1 of 4)
    A GPS base station was erected at a temporarily installed USGS benchmark (TMRK) located on the sound side of the Chandeleur Islands within about 6 km of the furthest sample site. GPS receivers recorded the 12-channel full-carrier-phase positioning signals (L1/L2) from satellites via the Thales choke-ring antenna. This GPS instrument combination was duplicated on the rover GPS. The base receiver and the rover receiver record their positions concurrently at 1-second (s) recording intervals throughout the survey. Occupation times at the sample sites ranged from 5 to 30 minutes. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Julie Bernier
    Geologist
    600 4th Street South
    St. Petersburg, FL
    USA

    (727) 502-8000 (voice)
    jbernier@usgs.gov
    Date: 2012 (process 2 of 4)
    The coordinate values of the GPS base station (TMRK) are the time-weighted average of values obtained from the National Geodetic Survey On-Line Positioning User Service (OPUS). The base station coordinates were imported into GrafNav and GrafNet, version 8.3 (Waypoint Product Group) and the GPS data from the rover were post-processed to the concurrent GPS session data at the base station. The GPS data were processed and exported in the World Geodetic System of 1984 (WGS84) (G1150) geodetic datum. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Julie Bernier
    Geologist
    600 4th Street South
    St. Petersburg, FL
    USA

    (727) 502-8000 (voice)
    jbernier@usgs.gov
    Date: 2013 (process 3 of 4)
    Sample locations were transformed from the GPS acquisition datum (WGS84) to the North American Datum of 1983 (NAD83), and the North American Vertical Datum of 1988 (NAVD88) orthometric elevation (geoid model of 2009, GEOID09) using NOAA VDatum version 3.2 transformation software (http://vdatum.noaa.gov/) and imported into ESRI ArcGIS version 10.1. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Julie Bernier
    Geologist
    600 4th Street South
    St. Petersburg, FL
    USA

    (727) 502-8000 (voice)
    Date: 13-Oct-2020 (process 4 of 4)
    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?
    The positional accuracy of the sample locations is determined by the accuracy of the raw position data recorded by the GPS antenna during data collection. Differential Geographic Positioning System (DGPS) coordinates were obtained using post-processing software packages (National Geodetic Survey's On-Line Positioning User Service (OPUS), version 2.2 and Waypoint Product Group's GrafNav and GrafNet, version 8.30).
  2. How accurate are the geographic locations?
    All static base station sessions were processed through OPUS, and the results were entered into a spreadsheet to compute a final, time-weighted positional coordinate (latitude, longitude, and ellipsoid height). Base-station positional error for each GPS session was calculated as the absolute value of the final position minus the session position value. The maximum horizontal error of the base station coordinates used for post-processing the sample locations was 0.00018 seconds latitude and 0.00045 seconds longitude.
  3. How accurate are the heights or depths?
    All static base station sessions were processed through On-Line Positioning User Service (OPUS) maintained by the National Oceanic and Atmospheric Administration (NOAA) and the National Geodetic Survey (NGS). The base location results from OPUS were entered into a spreadsheet to compute a final, time-weighted positional coordinate (latitude, longitude, and ellipsoid height). Base-station positional error for each GPS session was calculated as the absolute value of the final position minus the session position value. For this survey, the standard deviation or the base station ellipsoid height was 0.006 m and the maximum vertical error for the base station was +/- 0.021 m. All sample locations were post-processed to the base station coordinates.
  4. Where are the gaps in the data? What is missing?
    This is a complete, processed physical parameters data file for the 12BIM01, 12BIM02, 12BIM05, and 13BIM06 core time series archive.
  5. How consistent are the relationships among the observations, including topology?
    This dataset contains the post-processed DGPS coordinates for samples collected during four separate surveys in 2012 and 2013.

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 acknowledged as the originator of this dataset in any future products or research derived from these data.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey
    Attn: Marci Marot
    Geologist
    600 4th Street South
    St. Petersburg, FL
    USA

    (727) 502-8000 (voice)
    mmarot@usgs.gov
  2. What's the catalog number I need to order this data set? Downloadable data
  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, or for general or scientific purposes, 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: This zip file contains an ESRI ArcGIS map document, two sample location point shapefiles, an island-extent polygon shapefile, and the associated metadata. in format ESRI shapefile (version 10.1) Vector point data Size: 3.91
      Network links: http://pubs.usgs.gov/of/2014/1079/images/Tables/GIS_Core_Locations.zip
    • Cost to order the data: None, if obtained online

  5. What hardware or software do I need in order to use the data set?
    This shapefile was created using ESRI ArcGIS version 10.1 and can be opened using ESRI ArcGIS version 10.0 or higher; these data may also be viewed using the free GIS viewer ArcGIS Explorer (http://www.esri.com/software/arcgis/explorer).

Who wrote the metadata?

Dates:
Last modified: 16-Nov-2023
Metadata author:
U.S. Geological Survey
Attn: Julie Bernier
Geologist
600 4th Street South
St. Petersburg, FL
USA

(727) 502-8000 (voice)
jbernier@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/OFR20141079_GIS_Core_Locations-met.faq.html>
Generated by mp version 2.9.51 on Wed Oct 2 16:36:36 2024