Jamey M. Reid 2003 1.0 vector digital data Digital Data Series DDS-79 Woods Hole Field Center, Woods Hole, MA U.S. Geological Survey, Coastal and Marine Geology Program https://doi.org/10.3133/ds79 http://pubs.usgs.gov/dds/dds79 https://pubs.usgs.gov/dds/dds79/HTMLDOCS/catalog.htm S.J. Williams J.M. Reid V. Cross C. Polloni 2003 1.0 vector digital data Digital Data Series DDS-79 Woods Hole Field Center Woods Hole, MA U.S. Geological Survey, Coastal and Marine Geology Program 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 . https://doi.org/10.3133/ds79 http://pubs.usgs.gov/dds/dds79 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 and wetland loss 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) and the USGS Hurricane Andrew impact assessment (Penland and others, 1998), this data layer depicts the shore-normal transects used to measure shoreline change. The Isles Dernieres are located about 120 km southwest of New Orleans. This barrier island shoreline is 32 km long and extends from Caillou Bayou east to Wine Island Pass. The Isles Dernieres represent a barrier island arc developed from the reworking and erosion of an abandoned distributary of the Lafourche delta complex within the Mississippi River delta plain (Penland and others, 1988). Previous work by McBride and others (1992) documented a long-term (1887-1988) gulfside erosion rate of -11.1 m/y and a short-term (1978-1988) gulfside erosion rate of -19.2 m/y. The long-term bayside (1906- 1988) erosion rate was measured at -0.6 m/y and the short-term (1978-1988) bayside erosion rate was measured at -5.2 m/y. The Isles Dernieres decreased in area at a rate of -28.2 ha/y between 1887 and 1988, suggesting the long-term date of disappearance would be 2015. The rate of area loss between 1978 and 1988 was measured at -42.7 ha/y suggesting a short-term disappearance date of 2004. In the 1992 Hurricane Andrew impact assessment by Penland and others (1998), the Isles Dernieres experienced a brief and intense period of increased erosion. The average gulfside erosion rate accelerated to -59.37 m/y and the average bayside erosion rate accelerated to -10.8 m/y during the year of the 1992 Hurricane Andrew impact. The Isles Dernieres rate of area change accelerated to -155.7 ha/y during the 1992 hurricane season. Hurricane Andrew accelerated the long-term area loss rate to -28.5 ha/y and the shortterm area loss rate to -49.54 ha/y. The Hurricane Andrew impact on the Isles Dernieres produced 3-5 years of erosion in a matter of days. After the Hurricane Andrew impact, the projected long-term disappearance date of the Isles Dernieres was reduced from 2015 to 2012 and the short term disappearance date was reduced from 2004 to 2003. In this shoreline change update, the authors used the methods and transects used by McBride and others (1992) 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). To release data that was originally intended to be published in a paper atlas in a digital format. To up-date the shoreline change analysis by McBride and others (1992) and Penland and others (1998) for the Isles Dernieres to 1996. 1996 ground condition Complete None planned -90.963439 -90.581319 29.099566 29.023309 USGS Metadata Identifier USGS:4f2799c2-68ed-4596-8d40-e1a8f0e659f2 None U.S. Geological Survey USGS Woods Hole Field Center Coastal and Marine Geology Program CMGP Geographic Information System GIS University of New Orleans Louisiana State University barrier island aerial mapping aerial mapping photography coastal erosion coastal erosion processes shoreline change transects ISO 19115 Topic Category oceans geoscientificInformation USGS Thesaurus geospatial datasets coastal processes None Louisiana Gulf of Mexico Isles Derneries Terrebonne Parish United States North America None None University of New Orleans Paul Connor, Jr mailing and physical address

Dept. of Geology & Geophysics, Pontchartrain Institute, CRM Bldg. Room 343

2045 Lakeshore Drive

New Orleans LA 70148 USA (504) 280-1030 (504) 280-4022 pfconnor@crl.uno.edu https://pubs.usgs.gov/dds/dds79/HTMLDOCS/Browsefiles/idtrans_large.htm Browse graphic of the dataset. JPEG Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.2.0.700 R.A. McBride S. Penland M. Hiland S.J. Williams K.A. Westphal B. Jaffe A.H. Sallenger, Jr. 1992 1.0 atlas IMAP 2150-A, Chapter 4 Reston, VA U.S. Geological Survey https://doi.org/10.3133/i2150A S.J. Williams (editor) S. Penland (editor) A.H. Sallenger (editor) 1992 1.0 atlas IMAP 2150-A Reston, VA U.S. Geological Survey https://doi.org/10.3133/i2150A Information not available from original metadata. Information not available from original metadata. The projection was defined as UTM and converted to Geographic NAD 83. unknown U.S. Geological Survey Jamey M. Reid IT Specialist (Data Management) mailing and physical address

Woods Hole Field Center

384 Woods Hole Road

Woods Hole MA 025453-1598 USA (508) 548-8700 x 2204 (508) 457-2310 jreid@usgs.gov Metadata was created for the new shapefile. unknown U.S. Geological Survey Jamey M. Reid IT Specialist (Data Management) mailing and physical address

Woods Hole Field Center

384 Woods Hole Road

Woods Hole MA 025453-1598 USA (508) 457-2204 (508) 457-2310 jreid@usgs.gov 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) 20250814 U.S. Geological Survey VeeAnn A. Cross Marine Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 USA (508) 548-8700 x2251 (508) 457-2310 vatnipp@usgs.gov Vector String 91 0.000001 0.000001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 id_trans_gulf Shapefile Attribute Table Not available from original metadata. FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. ENTITY Unavailable from original metadata. Unavailable from original metadata. Unavailable from original metadata. LAYER Unavailable from original metadata. Unavailable from original metadata. Unavailable from original metadata. LEVEL Unavailable from original metadata. Unavailable from original metadata. Unavailable from original metadata. ELEVATION Unavailable from original metadata. Unavailable from original metadata. Unavailable from original metadata. COLOR Unavailable from original metadata. Unavailable from original metadata. Unavailable from original metadata. TRANSECT_N Unavailable from original metadata. Unavailable from original metadata. Unavailable from original metadata. U.S. Geological Survey S. Jeffress Williams Geologist mailing and physical address

Woods Hole Field Center

384 Woods Hole Road

Woods Hole MA 02543-1598 USA (508) 457-2383 (508) 457-2310 jwilliams@usgs.gov The dataset contains the polyline transects (id_trans_gulf.shp and other shapefile components) and the FGDC CSDGM metadata. The download zip file contains these transects as well as the 1887 and 1996 shorelines (id1887.shp and is1996.shp respectively). 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. Shapefile unknown Esri polyline shapefile These files are a collection of files with a common filename prefix and must be downloaded and stored in the same directory. Together they are the components of the shapefile. The dataset also includes CSDGM metadata. 0.035 https://pubs.usgs.gov/dds/dds79/LA_COVERS/Shoreline_Change/IslesDernieres.zip https://pubs.usgs.gov/dds/dds79/HTMLDOCS/catalog.htm https://doi.org/10.3133/ds79 The first link is to download the data directly. This download file contains the transects as well as the 1887 and 1996 shorelines. The second link is to the landing page of the data. The third link is to the citation page of the publication. none 20250815 U.S. Geological Survey Jamey M. Reid IT Specialist (Data Management) mailing and physical address

Woods Hole Field Center

384 Woods Hole Road

Woods Hole MA 025453-1598 USA (508) 548-8700 x 2204 (508) 457-2310 whsc_data_contact@usgs.gov The metadata contact email address is a generic address in the event the person is no longer with the U.S. Geological Survey. FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time