Kara S. Doran Joseph W. Long Hilary F. Stockdon Justin J. Birchler Matthew W. Hardy Miguel Loubriel Torres 20170609 tabular digital data U.S. Geological Survey Data Release doi:10.5066/F7GF0S0Z St. Petersburg, FL U.S. Geological Survey https://doi.org/10.5066/F7GF0S0Z The Storm-Induced Coastal Change Hazards component of the National Assessment of Coastal Change Hazards project focuses on understanding the magnitude and variability of extreme storm impacts on sandy beaches. Lidar-derived beach morphologic features such as dune crest, toe and shoreline help define the vulnerability of the beach to storm impacts. This dataset defines the elevation and position of the seaward-most dune crest and toe and the mean high water shoreline derived from the 2006 USGS Mississippi and Alabama Experimental Advanced Airborne Research Lidar (EAARL) lidar survey. Beach width is included and is defined as the distance between the dune toe and shoreline along a cross-shore profile. The beach slope is calculated using this beach width and the elevation of the shoreline and dune toe. To provide data on the morphology of U.S. sandy beaches. Data were collected during USGS field activity number (FAN) 06LTS04; additional survey details are available at http://cmgds.marine.usgs.gov/fan_info.php?fan=06LTS04. 20060920 20060922 ground condition Complete None planned -88.9655 -88.0746 30.1979 30.2515 USGS Metadata Identifier USGS:4b3540d9-77ac-4793-a2c5-366c9362f1a0 None U.S. Geological Survey USGS St. Petersburg Coastal and Marine Science Center Coastal and Marine Geology Program CMGP SPCMSC ISO 19115 Topic Category geoscientificInformation elevation environment oceans USGS Thesaurus hazards marine geology ocean sciences coastal processes None United States of America Gulf of Mexico Mississippi Alabama None 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 originators of the data in future products or derivative research. U.S. Geological Survey Hilary Stockdon mailing and physical

600 4th Street South

Saint Petersburg FL 33701 UNITED STATES 727-502-8074 727-502-8001 hstockdon@usgs.gov Microsoft Windows 7 Version 6.1 (Build 7600); Esri ArcGIS 10.0.4.4000; MATLAB 2014a Morphologic features are QA/QC'd in ArcMap and edited in MATLAB, if needed. 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. Horizontal accuracy is estimated for shorelines only by calculating the 95% confidence interval of the regression line through the shoreline position and is dependent on foreshore slope, scatter in the lidar data points, and specified lidar point uncertainty. Vertical accuracy is determined for each dune crest and toe value based upon the scatter of data in the lidar grid cell. U.S. Geological Survey (USGS) 2016 https://coastal.er.usgs.gov/data-release/doi-F7765CF4/ Online digital data 20060920 20060922 The date when lidar surveys were collected. 06LTS04 A lidar survey that was used to estimate dune morphology variables. Elevation data points from the lidar survey were interpolated in MATLAB 2014a to a gridded domain (segment) that was rotated parallel to the shoreline and had a resolution of 10 meters (m) in the longshore direction and 2.5 m in the cross-shore direction. The interpolation method applies spatial filtering with a Hanning window that is twice as wide as the grid resolution. Dune crest, toe and shoreline are extracted from the elevation grid in MATLAB every 10 m alongshore (each grid row is a profile). For details on feature extraction see: http://pubs.usgs.gov/of/2012/1084/. Not Complete Point point 18141 0.0197843295 0.0229959585 Decimal Degrees D WGS 1984 WGS 1984 6378137.0 298.257223563 North American Vertical Datum of 1988 0.0001 meter Attribute values 06LTS04_morphology.csv Dune crest, toe and shoreline, beach width and mean beach slope. USGS state State segment file identification (ID) number. See data dictionary for details of the numbering system. USGS 4 5 segment Segment ID number USGS 1 27 profile Grid row number corresponding to a cross-shore profile location. USGS 1 770 lon Feature location longitude (WGS84). USGS -88.9655 -88.0746 decimal degrees 999 Null value USGS lat Feature location latitude (WGS84). USGS 30.1979 30.2515 decimal degrees 999 Null value USGS x Cross-shore feature location. USGS -333.7995 179.5993 meters 999 Null value USGS z Feature elevation (NAVD88). For shorelines, it is the mean-high water elevation. USGS 0.23 11.2652 meters 999 Null value USGS x_err 95% confidence interval for the cross-shore shoreline position (NAVD88). USGS 0.0001 1.1994 meters 999 Null value USGS z_err Root mean squared vertical error of dune crest (NAVD88). USGS 0 6.3541 meters 999 Null value USGS beach_width Distance between dune toe and shoreline (NAVD88). USGS 9.9102 207.7069 meters 999 Null value USGS slope Mean beach slope calculated between dune toe and shoreline (NAVD88). USGS 0.0077 0.1386 radians 999 Null value USGS feature_type An identifier for the type of feature in the table entry. USGS DC, DT, SL Dune Crest, Dune Toe, Shoreline USGS U.S. Geological Survey Kara S. Doran mailing and physical

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Saint Petersburg FL 33701 727-502-8117 727-502-8001 kdoran@usgs.gov 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. ASCII none https://coastal.er.usgs.gov/data-release/doi-F7GF0S0Z/data/06LTS04_morphology.zip none 20240712 U.S. Geological Survey Kara S. Doran mailing and physical

600 4th Street South

Saint Petersburg FL 33701 UNITED STATES 727-502-8117 727-502-8001 kdoran@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time