U.S. Geological Survey
2015
Shorelines Extracted from 1984-2015 Landsat Imagery: Horn Island, Mississippi (Polygon: Individual Dates)
vector digital data
St. Petersburg, Florida.
U.S. Geological Survey
https://doi.org/10.5066/F7XW4GVG
Shorelines Extracted from 1984-2015 Landsat Imagery: Horn Island, Mississippi (Polygon: Individual Dates) is a dataset consisting of 254 polygon shapefiles representing shorelines generated from satellite imagery that was collected from 1984 to 2015. The sample frequency of satellite imagery is much higher, and the coverage much greater, than most routine high-resolution topographic surveys. Certain aspects of barrier island morphology, such as island size, shape and position, can be determined from these images and can indicate erosion, land loss, and island breakup. Studying how these characteristics evolve will help develop an understanding of how barrier islands will respond to climate change, sea level rise, and major storms in the future and that will serve to improve management of coastal resources.
To document the Horn Island, Miss. shorelines, from March 25, 1984 to May 23, 2015 as observed from Landsat 5 Thematic Mapper (TM), Landsat 7 Enhanced Thematic Mapper Plus (ETM+), and Landsat Operational Land Imager (OLI) satellite imagery. These data will aid in developing an understanding of the change in barrier island size, shape and position, which can indicate erosion, land loss and island breakup. This dataset, horn_polys_individual_dates.zip, and others are included in a USGS Data Release, which can be accessed online at https://doi.org/10.5066/F7XW4GVG.
19840325
20150523
ground condition
None planned
-88.782547
-88.557259
30.255192
30.216607
USGS Metadata Identifier
USGS:ff233cbd-afea-464e-80f5-7cbfbeeb1625
None
satellite imagery
remote sensing
Landsat 5
Landsat 7
Landsat 8
Thematic Mapper (TM)
Enhanced Thematic Mapper Plus (ETM+)
Operational Land Imager (OLI)
barrier island
shoreline
Global Change Master Directory (GCMD)
LAND SURFACE > LAND USE/LAND COVER > LAND COVER
OCEAN > COASTAL PROCESSES > BARRIER ISLANDS
COASTAL PROCESSES > BEACHES
DOI/USGS/CMG > COASTAL AND MARINE GEOLOGY, U.S. GEOLOGICAL SURVEY, U.S. DEPARTMENT OF INTERIOR
Marine Realms Information Bank (MRIB) Keywords
mapping
shore
shoreline erosion
shoreline accretion
barrier island migration
remote sensing
aerial and satellite photography
USGS Thesaurus
coastal processes
erosion
shoreline accretion
barrier island migration
remote sensing
None
Mississippi
Horn Island
United States
Jackson County
Gulf of Mexico
Mississippi Sound
General
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2013
2014
2015
None.
None. However, variability in image quality from one date to another, from one image to another on the same date, and from one part of a single image to another part of the same image, exists due to many factors including variation in sun angle, atmospheric conditions, season, reflectivity of the earth surface, camera angle, camera lens, camera settings, film sensitivity, water turbidity, water depth, tide level, waves, and error in image rectification. No adjustments were made to account for tide level.
U.S. Geological Survey
Kristy Guy
mailing and physical
600 4th St. S.
St. Petersburg
FL
33701
USA
727-502-8000
727-502-8181
kguy@usgs.gov
Monday through Friday 9:00 AM to 5:00 PM (Eastern Time)
Acknowledgment of the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Coastal and Marine Geology Program (SPCMSC), 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.
Variations in image quality and in atmospheric and surface conditions may have affected the quality of the shorelines. Tide levels vary from image to image which affects the apparent shoreline. No adjustments were made for varying tide levels.
This dataset is considered complete for the information presented, as described in the abstract section. Users are advised to read the rest of the metadata record carefully for additional details. Landsat 7 ETM+ images after May 2003 were not used due to striping caused by the failure of the instrument's scan-line corrector. No shorelines were created for 2012 due to poor Landsat 7 image quality.
The horizontal accuracy of the data is unknown.
USGS
2011
USGS Landsat 5 TM Images
satellite imagery
Sioux Falls, SD
USGS Earth Resources Observation and Science (EROS) Center
online
19840325
20111019
ground condition
Landsat 5 TM
This data source was used to identify barrier island shorelines.
USGS
2003
USGS Landsat 7 ETM+ Images
satellite imagery
Sioux Falls, SD
USGS Earth Resources Observation and Science (EROS) Center
online
19990722
20030223
ground condition
Landsat 7 ETM+
This data source was used to identify barrier island shorelines.
USGS
2015
USGS Landsat 8 OLI Images
satellite imagery
Sioux Falls, SD
USGS Earth Resources Observation and Science (EROS) Center
online
20130618
20150523
ground condition
Landsat 8 OLI
This data source was used to identify barrier island shorelines.
Landsat 5 Thematic Mapper (TM), Landsat 7 Enhanced Thematic Mapper Plus (ETM+), and Landsat 8 Operational Land Imager (OLI) satellite imagery were acquired in digital format from the U.S. Geological Survey Global Visualization Viewer (http://glovis.usgs.gov/). Images were selected based on cloud-free areas of interest. Landsat 7 ETM+ images after May 2003 were not used due to striping caused by the failure of the instrument's scan-line corrector. The Landsat images were processed using ArcGIS. Images were subset (trimmed) to the area of interest and isolines were generated based on the numerical values of band 7. Band 7, an infrared band (2.08-2.35 µm for TM, 2.09-2.35 µm for ETM+, 2.11-2.29 µm for OLI), clearly distinguishes land from water due to the absorption of these wavelengths by water (Lillesand and Kiefer, 1987) resulting in a low reflectance in contrast to the higher reflectance of land areas, particularly sand. Each isoline was visually compared with its corresponding image and the isoline that best represented the land/water line was selected to represent the shoreline and saved to a shapefile. When necessary, small hand edits were made to the selected isolines. The line features were then converted to polygons. Wet, marshy shorelines were less reliably delineated using this method and varied more with tide level than the sandy shorelines. Predicted tide levels relative to Mean Lower Low Water (MLLW) from the Dauphin Island tide station were obtained from a tide and current prediction program, WXTide32, (www.wxtide32.com) and added as an attribute to horn_po_19840325_20150523.shp. No adjustments were made to the shorelines for varying tide levels.
Landsat 5 TM
Landsat 7 ETM+
Landsat 8 OLI
2015
horn_po_*.shp
USGS
mailing and physical
600 4th St. S.
St. Petersburg
FL
33701
USA
727-502-8000
727-502-8181
Monday through Friday 8:00 AM to 5:00 PM (Eastern Time)
If unable to reach the contact by telephone, please leave a voice message.
Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog.
20170214
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
G-polygon
8869
Universal Transverse Mercator
16
0.9996
-87.0
0.0
500000.0
0.0
coordinate pair
0.6096
0.6096
meter
Geographic Coordinate System World Geodetic System WGS 1984
World Geodetic System 1984
6378137.0
298.257223563
horn_po_*.shp
Esri polygon features representing Horn Island, Mississippi shorelines from 1984-2015. Shorelines generated by the SPCMSC were created and saved into 254 individual polygon shapefiles.
USGS
FID
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
Esri
Polygon
Shape of feature.
Esri
Date_
Date of satellite image source.
USGS
Date that the source image was collected in month, day, and year format.
Area_
Area of the polygon in square meters.
USGS
2.60957730
15946861.6
YYYYMMDD
Date that the source image was collected formatted as an 8-digit number representing the year, month, and day.
USGS
Date formatted as an 8-digit number representing year, month, and day.
WXT32Dau
The predicted tide level, in meters relative to MLLW, at the Dauphin Island tide station at the time of image collection. These data were obtained from WXTide32 (www.wxtide32.com), a tide and current prediction program.
USGS
-0.26
0.58
Landsat
The Landsat satellite number.
USGS
5
Number of the Landsat satellite.
USGS
7
Number of the Landsat satellite.
USGS
8
Number of the Landsat satellite.
USGS
Kristy Guy
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, Fla.
GIS/RS Analyst
mailing and physical address
600 4th Street South
St. Petersburg
FL
33701
USA
727-502-8000
Monday-Friday, 9:00-5:00 Eastern Time
Downloadable data - USGS Data Release
Although these data were processed successfully on a computer system at the USGS, 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 constitute any such warranty. The USGS shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
ArcGIS shapefile
http://coastal.er.usgs.gov/data-release/doi-F7XW4GVG/data/horn_polys_individual_dates.zip
None if obtained online; otherwise prices vary.
Publications are available from USGS Information Services, Box 25286, Federal Center, Denver, CO 80225-0046 (telephone: 1-888-ASK-USGS, e-mail: infoservices@usgs.gov).
20201013
USGS
Kristy Guy
mailing and physical
600 4th Street South
St. Petersburg
FL
33701
USA
727-502-8000
727-502-8181
kguy@usgs.gov
Monday through Friday 9:00 AM to 5:00 PM (Eastern Time)
FGDC Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
None.
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS)St. Petersburg Coastal and Marine Science Center Coastal and Marine Geology Program as the originator of these data in future products or derivative research.
None.
Unclassified
None.