Sediment Sample Locations Collected in September 2012 from the Northern Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Number 12LGC02)

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Frequently anticipated questions:


What does this data set describe?

Title:
Sediment Sample Locations Collected in September 2012 from the Northern Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Number 12LGC02)
Abstract:
As part of the Barrier Island Evolution Research (BIER) project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) collected sediment samples from the northern Chandeleur Islands in March and September 2012. The overall objective of this project, which integrates geophysical (bathymetric, seismic, and topographic) and sedimentologic data, is to better understand the depositional and erosional processes that drive the morphologic evolution of barrier islands over annual to interannual timescales (1 to 5 years). Between June 2010 and April 2011, in response to the Deepwater Horizon oil spill, the State of Louisiana constructed a sand berm extending more than 14 kilometers (km) along the northern Chandeleur Islands platform. The construction of the berm provided a unique opportunity to investigate how this new sediment source will interact with and affect the morphologic evolution of the barrier-island system. Data collected from this study will be used to describe differences in the physical characteristics and spatial distribution of sediments both along the axis of the berm and also along transects across the berm and onto the adjacent barrier island. Comparison of these data with data from subsequent sampling efforts will provide information about sediment interactions and movement between the berm and the natural island platform, improving our understanding of short-term morphologic change and processes in this barrier-island system. This data series serves as an archive of sediment data collected in March and September 2012 from the Chandeleur Islands sand berm and adjacent barrier-island environments. Data products, including descriptive core logs, core photographs and x-radiographs, results of sediment grain-size analyses, sample location maps, and Geographic Information System (GIS) data files with accompanying formal Federal Geographic Data Committee (FDGC) metadata, can be downloaded from http://pubs.usgs.gov/ds/850/data.html.
Supplemental_Information: None
  1. How might this data set be cited?
    Bernier, Julie C., 20131231, Sediment Sample Locations Collected in September 2012 from the Northern Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Number 12LGC02):.

    Online Links:

    This is part of the following larger work.

    Bernier, Julie C., Kelso, Kyle W., Buster, Noreen A., Flocks, James G., Miselis, Jennifer L., and DeWitt, Nancy T., 20131231, Sediment Data Collected in 2012 from the Northern Chandeleur Islands, Louisiana: U.S. Geological Survey Data Series 850, U.S. Geological Survey, St. Petersburg, FL.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -88.827622
    East_Bounding_Coordinate: -88.821298
    North_Bounding_Coordinate: 29.940845
    South_Bounding_Coordinate: 29.940080
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 07-Sep-2012
    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?
    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: 0.01
      Altitude_Distance_Units: Meters
      Altitude_Encoding_Method: Attribute values
  7. How does the data set describe geographic features?
    12LGC02_samplesites.xlsx
    Microsoft Excel spreadsheet defining the location of sediment samples collected in September 2012 from the northern Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Number 12LGC02) (Source: USGS)
    SAMPLE
    Sample identification number (Source: USGS) Character string
    LATITUDE
    Latitude of sample location in decimal degrees (NAD83) (Source: USGS)
    Range of values
    Minimum:29.94008
    Maximum:29.94083
    Units:decimal degrees
    Resolution:0.00001
    LONGITUDE
    Longitude of sample location in decimal degrees (NAD83) (Source: USGS)
    Range of values
    Minimum:-88.82761
    Maximum:-88.82131
    Units:decimal degrees
    Resolution:0.00001
    EASTING (m)
    X-coordinate (easting) of sample location in meters (NAD83, UTM Zone 16N) (Source: USGS)
    Range of values
    Minimum:323610.325
    Maximum:324219.75
    Units:Meters
    Resolution:0.001
    NORTHING (m)
    Y-coordinate (northing) of sample location in meters (NAD83, UTM Zone 16N) (Source: USGS)
    Range of values
    Minimum:3313550.125
    Maximum:3313625.192
    Units:Meters
    Resolution:0.001
    ELEVATION (m)
    Elevation of sample location in meters (NAVD88, GEOID09) (Source: USGS)
    ValueDefinition
    -9999No Data - Sample location was collected outside of the lidar elevation dataset extent
    Range of values
    Minimum:0.11
    Maximum:0.16
    Units:Meters
    Resolution:0.01

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: Julie Bernier
    Geologist
    600 4th Street South
    St. Petersburg, FL
    USA

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

Why was the data set created?

This zip archive includes the geographic locations, site descriptions, and interpolated elevations in Microsoft Excel format for sediment samples collected in September 2012 from the northern Chandeleur Islands, Louisiana (U.S. Geological Survey Field Activity Number 12LGC02).

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)
    Sample locations were recorded at the time of collection using a Garmin GPSMAP 78SC handheld Global Positioning System (GPS) receiver. 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 2 of 4)
    Sample locations were transformed from the GPS acquisition datum (World Geodetic System of 1984, WGS84) to the North American Datum of 1983 (NAD83), Universal Transverse Mercator (UTM) Zone 16 North 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: 2013 (process 3 of 4)
    Surface elevations of the sediment samples were interpolated from a 2.5-meter by 2.5-meter gridded surface of USGS lidar data collected in September 2012 using the Spatial Analyst Extract Values to Points tool in 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)
    jbernier@usgs.gov
    Date: 26-Mar-2018 (process 4 of 4)
    Keywords section of metadata optimized by adding theme keyword thesauri and associated keywords. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Arnell S. Forde
    Geologist
    600 4th Street South
    St. Petersburg, FL

    727-502-8000 (voice)
    aforde@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 Garmin GPSMAP 78SC handheld Global Positioning System (GPS) receiver used to locate the samples at the time of collection.
  2. How accurate are the geographic locations?
    Sample locations were recorded at the time of collection using a Garmin GPSMAP 78SC handheld Global Positioning System (GPS) receiver.
  3. How accurate are the heights or depths?
    Surface elevations of the sediment samples were interpolated from USGS lidar data collected in September 2012.
  4. Where are the gaps in the data? What is missing?
    This dataset includes the locations of 12 surface grab samples that were collected from the northern Chandeleur Islands in September 2012 (U.S. Geological Survey Field Activity Number 12LGC02).
  5. How consistent are the relationships among the observations, including topology?
    Sample locations were recorded at the time of collection using a Garmin GPSMAP 78SC handheld Global Positioning System (GPS) receiver.

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: Julie Bernier
    Geologist
    600 4th Street South
    St. Petersburg, FL
    USA

    (727) 502-8000 (voice)
    jbernier@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 archive contains a Microsoft Excel spreadsheet with sample information for sediment samples collected in September 2012 (USGS Field Activity Number 12LGC02) and associated metadata. in format Microsoft Excel (version 2010) Tabular point data Size: 0.11
      Network links: https://pubs.usgs.gov/ds/0850/downloads/12LGC02_samplesites.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 spreadsheet was created using Microsoft Excel 2010 and can be opened using Microsoft Excel 2007 or higher; these data may also be viewed using the free Microsoft Excel Viewer (http://www.microsoft.com/).

Who wrote the metadata?

Dates:
Last modified: 26-Mar-2018
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:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/12LGC02_samplesites-met.faq.html>
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