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).
Reid, Jamey M. , 2003, Caminada-Moreau Headland, Gulf Side Transects: U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Field Center, Woods Hole, MA.This is part of the following larger work.Online Links:
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:
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000000. Longitudes are given to the nearest 0.000000. 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.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
Paul Connor, Jr.
University of New Orleans - Dept. of Geology and Geophysics
Pontchartrain Institute, CERM Bldg. Room 343
New Orleans, LA 70148
USA
504-580-1030 (voice)
504-280-4022 (FAX)
pfconnor@crl.uno.edu
To release data that was originally intended to be published in a paper atlas in a digital format.
Person who carried out this activity:
U.S. Geological Survey
c/o Jamey M. Reid
IT Specialist (Data Management)
Woods Hole Field Center
Woods Hole, MA 025453-1598
USA
(508) 548-8700 x 2204 (voice)
(508) 457-2310 (FAX)
jreid@usgs.gov
Person who carried out this activity:
U.S. Geological Survey
c/o Jamey M. Reid
IT Specialist (Data Management)
Woods Hole Field Center
Woods Hole, MA 025453-1598
USA
(508) 457-2204 (voice)
(508) 457-2310 (FAX)
jreid@usgs.gov
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints: None
U.S. Geological Survey
c/o S. Jeffress Williams
Geologist
Woods Hole Field Center
Woods Hole, MA 02543-1598
USA
(508) 457-2383 (voice)
(508) 457-2310 (FAX)
jwilliams@usgs.gov
Downloadable Data
Although this data set has been used by the U.S. Geological Survey (USGS), no warranty, express or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.
Data format: | Size: 0.027 |
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U.S. Geological Survey
c/o Jamey M. Reid
IT Specialist (Data Management)
Woods Hole Field Center
Woods Hole, MA 025453-1598
USA
(508) 548-8700 x 2204 (voice)
(508) 457-2310 (FAX)
jreid@usgs.gov