Joseph F. Terrano
Kathryn E. Smith
James G. Flocks
20160125
2010 Digitized Shoreline for Breton Island, Louisiana (Geographic, NAD83)
vector digital data (Polyline)
U.S. Geological Survey Data Release
doi:10.5066/F7XS5SGM
St. Petersburg, FL
U.S. Geological Survey
https://doi.org/10.5066/F7XS5SGM
Shorelines were derived from the National Agriculture Imagery Program (NAIP) digital ortho imagery collected on May 10, 2010. This dataset contains digitized shorelines created from the NAIP imagery for Breton Island, Louisiana. Shorelines were digitized in ArcMap 10.2.2 so they could be used for area and shoreline change analysis using the Digital Shoreline Analysis System (DSAS) version 4.0.
Shoreline data are considered a crucial element in performing change analysis for erosion and accretion studies and for tracking shoreline movement over time. Aerial imagery was downloaded and used to document the short and long-term changes of several barrier island systems in Louisiana. Digitized shorelines from the imagery provide an accurate and measurable change in shape, area, and shoreline movement over short and long-term periods.
20100510
ground condition
None planned
-89.177336
-89.170255
29.496958
29.484451
USGS Metadata Identifier
USGS:f6ff9093-1b26-4dd0-b5ed-52c9a42f8418
None
NAIP
Coastal
Shoreline data
Shoreline
Shoreline map
Digitization
Mean High Water
ISO 19115 Topic Category
Oceans
Elevation
Environment
Boundaries
GeoscientificInformation
Marine Realms Information Bank (MRIB) Keywords
mapping
shore
shoreline erosion
shoreline accretion
barrier island migration
USGS Thesaurus
coastal processes
erosion
shoreline accretion
barrier island migration
None
LA
Breton Island
Gulf of Mexico
Louisiana
USA
None
2010
None
The U.S. Geological Survey requests to be acknowledged as originator of the data in future products or derivative research.
U.S. Geological Survey Coastal and Marine Science Center
Joseph F. Terrano
Researcher 1
mailing and physical
600 4th Street South
St. Petersburg
Florida
33701
US
(727) 502-8047
(727) 502-8001
jterrano@usgs.gov
Monday through Friday, 9:00 a.m. to 5:00 p.m., Eastern Standard Time
Funds for this report are part of project funds for the Louisiana Outer Coast Early Restoration Project, obtained by the natural resource trustees for the Deepwater Horizon Oil Spill, pursuant to the Framework for Early Restoration Addressing Injuries Resulting from the Deepwater Horizon Oil Spill executed April 20, 2011. USFWS is the project lead for the North Breton Island Barrier Island Restoration project. Acknowledgment of the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, as a data source would be appreciated in products developed from these data, and such acknowledgment as is standard for citation and legal practices. Sharing of new data layers developed directly from these data would also be appreciated by the U.S. Geological Survey staff. Users should be aware that comparisons with other datasets for the same area from other time periods may be inaccurate due to inconsistencies resulting from changes in photointerpretation, mapping conventions, and digital processes over time. These data are not legal documents and are not to be used as such.
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.2.2.3552
Martinez, L., O’Brien, S., Bethel, M., Penland, S., and Kulp, M.
2009
Louisiana Barrier Island Comprehensive Monitoring Program (BICM)
Volume 2: Shoreline Changes and Barrier Island Land Loss 1800’s‐2005
http://lacoast.gov/reports/project/3890772~1.pdf
Morton, R.A., Miller, T.L., and Moore, L.J.
2008
National Assessment of Shoreline Change: Part 1, Historical Shoreline Changes and Associated Coastal Land Loss Along the U.S. Gulf of Mexico
https://pubs.usgs.gov/of/2004/1043/
Vectorized shorelines were checked to ensure they were one continuous line. Dangles (or extra line segments) were removed, as necessary. The shorelines were split into foreshore and backshore based on a visual assessment.
To ensure accuracy, digitized shorelines were compared to those shown on the Breton Island, LA T-sheets created from 1922-1950, as a method for maintaining consistency between which areas were digitized from each of the shoreline datasets.
U.S. Department of Agriculture National Agriculture Imagery Program
2010
Digital ortho imagery for Breton Island, Louisiana, May 10, 2010
remote-sensing data
http://earthexplorer.usgs.gov/
1500
Online
20100510
ground condition
Breton Island NAIP imagery
Aerial imagery was used to identify the mean high water (MHW) location for shoreline delineation and digitization.
Aerial imagery was collected over Breton Island, Louisiana on May 10, 2010. The NAIP provides two main products: 1 meter Ground Sample Distance (GSD) ortho imagery rectified to a horizontal accuracy within +/- 5 meters of reference Digital Ortho Quarter Quads (DOQQ's) from the National Digital Ortho Program (NDOP) or from the National Agriculture Imagery Program (NAIP); 1 meter GSD ortho imagery rectified within +/- 6 meters to true ground. The tiling format of NAIP imagery is based on a 3.75' x 3.75' quarter quadrangle with a 300-meter buffer on all four sides. The NAIP imagery is formatted to the UTM coordinate system using the North American Datum of 1983 (NAD83). The NAIP imagery may contain as much as 10% cloud cover per tile. They are projected to Universal Transverse Mercator (UTM), Zone 16, North American Datum (NAD) 1983, meters (m) coordinates. To digitize the shorelines, the aerial imagery was added to ArcMap 10.2.2. Using the ArcMap editor toolbar, shorelines were digitized based on aerial imagery. Shorelines were digitized based on a visual assessment of shoreline locations within the imagery at a scale of 1:1500. In addition to the Breton Island shoreline, smaller islands within 50 meters were also digitized. When available, oblique aerial images were used as a guide to check the digitized shoreline for accuracy and any errors were corrected accordingly. The main Breton Island shorelines were then split at the northern most point and the southern most point to get a foreshore and backshore shoreline. In addition, the following fields were added to the shoreline’s attribute table and calculated, as necessary: "UNCERTAINT" (double), "DATE_" (Text/10), "Shoreline_" (Text/20), and "Year" (Text/10) fields and calculated as necessary.
20150601
U.S. Geological Survey
Joseph Terrano
mailing and physical
600 4th Street South
St. Petersburg
Florida
33701
US
(727) 502-8047
(727) 502-8001
jterrano@usgs.gov
Monday through Friday, 9:00 a.m. to 5:00 p.m., Eastern Standard Time
Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog.
20170313
U.S. Geological Survey
Alan O. Allwardt
Contractor -- Information Specialist
mailing and physical address
2885 Mission Street
Santa Cruz
CA
95060
831-460-7551
831-427-4748
aallwardt@usgs.gov
Added keywords section with USGS persistent identifier as theme keyword.
20201013
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Vector
String
54
Universal Transverse Mercator
16
coordinate pair
0.6096
0.6096
meter
D North American 1983
GRS 1980
6378137.0
298.257222101
Breton_Island_2010_Shoreline
Shapefile
USGS
Shape
Feature geometry
ESRI
Coordinates defining the features
OBJECTID
Automatically generated values used to identify features.
ESRI
1
5
Shape_Leng
Length of feature in internal units.
Esri
336.930392
3044.62398
UNCERTAINT
A value representing the error associated with the imagery type that is used in the Digital Shoreline Analysis System (DSAS) statistical computations.
USGS
3.2
Uncertainty of the shoreline position (in meters).
USGS
DATE_
Date imagery was collected for Breton Island using the mm/dd/yyyy format. Imagery dates for data not representing Breton Island were excluded.
USGS
Date using the mm/dd/yyyy format
Shoreline_
Shoreline classification used to separate foreshore and backshore shorelines.
USGS
Shorelines classified as "Fore" for foreshore and "Back" for backshore shorelines.
Year
4-digit year in which the imagery was collected.
USGS
Single year in the YYYY format
U.S. Geological Survey
James Flocks
mailing and physical
600 4th Street South
St. Petersburg
Florida
33701
US
(727) 502-8012
(727) 502-8001
Monday through Friday, 9:00 a.m. to 5:00 p.m., Eastern Standard Time
All of this report is available online.
Breton_Island_2010_Shoreline.shp
This digital 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, 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.
ArcGIS shapefile
Shapefile containing 2010 digitized shoreline for Breton Island, LA
https://coastal.er.usgs.gov/data-release/doi-F7XS5SGM/data/shapefiles/shorelines.zip
None
20201013
U.S. Geological Survey
Joseph Terrano
mailing and physical
600 4th Street South
St. Petersburg
Florida
33701
US
(727) 502-8047
(727) 502-8001
jterrano@usgs.gov
Monday through Friday, 9:00 a.m. to 5:00 p.m., Eastern Standard Time
FGDC Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of the data in future products or derivative research.