North Chandeleur Island, Gulf Side Transects

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Frequently anticipated questions:

What does this data set describe?

Title: North Chandeleur Island, Gulf Side Transects
Abstract:
The U.S. Geological Survey (USGS), in cooperation with the Coastal Research Laboratory in the Department of Geology and Geophysics at the University of New Orleans (UNO) and the Center for Coastal Energy and Environmental Resources at Louisiana State University (LSU), is investigating the processes of coastal erosion in Louisiana (Sallenger and others, 1987; Sallenger and Williams 1989; Penland and others, 1992).
Building on the USGS Louisiana Barrier Island Study (Williams and others, 1992), this data layer depicts the shore-normal transects that were used to measure shoreline change.
The methods and transects used by McBride and others (1992) were used to insure data compatibility of the new measurements and analysis.
To evaluate change in the shoreline position, shore-normal transects were constructed at approximately 15-second intervals of longitude or latitude depending on shoreline orientation. Isles Dernieres, Bayou Lafourche and Plaquemines barrier systems (east-west shroelines) were analyzed using 15-second (about 404 m) intervals of longitude, while the Chandeleur Islands (north-south shorelines) were examined by using 15-second (about 462 m) intervals of latitude. Measurements of shoreline movement and change in island width were taken along transects perpendicular to the composite shoreline trend. Average rates of movement and area change were calculated by dividing absolute measurements by elapsed time (year, month, and day - where available.) Shoreline change maps were procuded to determine the spatial and temporal distribution of shoreline movement (magnitude, direction, and rate of change) and document geomorphologic evolution. (McBride and others, 1992).
  1. How might this data set be cited?
    Reid, Jamey M., 2003, North Chandeleur Island, Gulf Side Transects: Digital Data Series DDS-79, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Field Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Williams, S.J., Reid, J.M., Cross, V., and Polloni, C., 2003, Coastal Erosion and Wetland Change in Louisiana: Selected USGS Products: Digital Data Series DDS-79, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Field Center.

    Online Links:

    Other_Citation_Details:
    suggested citation: Williams, S.J., Reid, J.M., Cross, V.A., and Polloni, C.F., 2003, Coastal erosion and wetland change in Louisiana — Selected USGS products: U.S. Geological Survey Digital Data Series 79, https://doi.org/10.3133/ds79 .
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -88.918211
    East_Bounding_Coordinate: -88.809592
    North_Bounding_Coordinate: 30.058408
    South_Bounding_Coordinate: 29.703936
  3. What does it look like?
    https://pubs.usgs.gov/dds/dds79/HTMLDOCS/Browsefiles/cinorth_translarge.htm (JPEG)
    Browse graphic of the dataset.
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1996
    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 (85)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees. 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 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.
  7. How does the data set describe geographic features?
    ci_north_trans_gulf
    Shapefile Attribute Table (Source: Not available from original metadata.)
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    ENTITY
    Unavailable from original metadata. (Source: Unavailable from original metadata.) Unavailable from original metadata.
    LAYER
    Unavailable from original metadata. (Source: Unavailable from original metadata.) Unavailable from original metadata.
    COLOR
    Unavailable from original metadata. (Source: Unavailable from original metadata.) Unavailable from original metadata.
    TRANS_NO
    Unavailable from original metadata. (Source: Unavailable from original metadata.) Unavailable from original metadata.
    COLOR
    Unavailable from original metadata. (Source: Unavailable from original metadata.) Unavailable from original metadata.
    MSLINK_DMR
    Unavailable from original metadata. (Source: Unavailable from original metadata.) Unavailable from original metadata.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Jamey M. Reid
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Paul Connor, Jr.
    University of New Orleans - Dept. of Geology and Geophysics
    Pontchartrain Institute, CERM Bldg. Room 343
    New Orleans, LA
    USA

    504-580-1030 (voice)
    504-280-4022 (FAX)
    pfconnor@crl.uno.edu

Why was the data set created?

To release data that was originally intended to be published in a paper atlas in a digital format.

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: unknown (process 1 of 3)
    The projection was defined as UTM and converted to Geographic NAD 83. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Jamey M. Reid
    IT Specialist (Data Management)
    Woods Hole Field Center
    Woods Hole, MA
    USA

    (508) 548-8700 x 2204 (voice)
    (508) 457-2310 (FAX)
    jreid@usgs.gov
    Date: unknown (process 2 of 3)
    Metdata as created for the new shapefile. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Jamey M. Reid
    IT Specialist (Data Management)
    Woods Hole Field Center
    Woods Hole, MA
    USA

    (508) 457-2204 (voice)
    (508) 457-2310 (FAX)
    jreid@usgs.gov
    Date: 14-Aug-2025 (process 3 of 3)
    Edited the metadata to remove errors flagged by MP. Edits include, but are not limited to: Filled out the citation information including adding the suggested citation, adding the DOI link and a link to the data page. Added USGS Thesaurus and ISO 19115 Topic Category theme keywords. Added the link to the browse graphic. Added additional information to the cross-reference, including fixing the title. Indicated in some required elements that information was unavailable from the original metadata. Additional small edits to the metadata were made to be consistent with current standards. Updated the distribution liability to an approved FSP disclaimer statement. Updated the distribution information to include download links. The metadata date was updated, but not the metadata contact. The metadata contact email was updated to a valid link with an explanation in the contact instructions. The metadata available from a harvester may supersede metadata available from the publication. Compare the metadata dates to determine which metadata file is most recent. A persistent identifier (PID) was added to the metadata in the thesaurus section. (20250814) Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    (508) 548-8700 x2251 (voice)
    (508) 457-2310 (FAX)
    vatnipp@usgs.gov
  3. What similar or related data should the user be aware of?
    McBride, R.A., Penland, S., Hiland, M., Williams, S.J., Westpahl, K.A., Jaffe, B., and A.H. Sallenger, Jr., 1992, Analysis of Barrier Shoreline Change in Louisian from 1853 to 1989: IMAP 2150-A, Chapter 4, U.S. Geological Survey, Reston, VA.

    Online Links:

    This is part of the following larger work.

    (editor), S.J. Williams, (editor), S. Penland, and (editor), A.H. Sallenger, 1992, Atlas of Shoreline Changes in Louisians from 1853 to 1989: Louisian barrier island erosion study: IMAP 2150-A, 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?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Information not available from original metadata.
  5. How consistent are the relationships among the observations, including topology?
    Information not available from original metadata.

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 None
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey
    Attn: S. Jeffress Williams
    Geologist
    Woods Hole Field Center
    Woods Hole, MA
    USA

    (508) 457-2383 (voice)
    (508) 457-2310 (FAX)
    jwilliams@usgs.gov
  2. What's the catalog number I need to order this data set? The dataset contains the polyline transects (ci_north_trans_gulf.shp and other shapefile components) and the FGDC CSDGM metadata. The download zip file contains these transects as well as the 1855 and 1999 shorelines (ci_north1855.shp and ci_north1999.shp respectively).
  3. What legal disclaimers am I supposed to read?
    Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 15-Aug-2025
Metadata author:
U.S. Geological Survey
Attn: Jamey M. Reid
IT Specialist (Data Management)
Woods Hole Field Center
Woods Hole, MA
USA

(508) 548-8700 x 2204 (voice)
(508) 457-2310 (FAX)
whsc_data_contact@usgs.gov
Contact_Instructions:
The metadata contact email address is a generic address in the event the person is no longer with the U.S. Geological Survey.
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/data_series/DDS-79/ci_north_trans_gulfmeta.faq.html>
Generated by mp version 2.9.51 on Fri Aug 15 12:16:49 2025