Stephen B. Hartley William R. Jones 20240826 raster digital data https://doi.org/10.5066/P1OHGKWF South Louisiana's continued land-loss due to erosion and subsidence is a constant process and demands attention thru restoration and mitigation efforts. Data is needed to determine elevation and vegetation related to subsidence, climate change and saltwater intrusion. This information is critical to our partners for continued monitoring of marsh in degrading landscape. Weather from subsidence ,erosion or other factors, changing sediments is having detrimental effects on the marsh landscape. Providing imagery and digital surface models will help researchers correlate other datasets to determine factors contributing to marsh changes. Data was collected to monitor marsh elevation coastal in Louisiana Barataria Basin. Author ORCIDs: Hartley, S.B.(0000-0003-1380-2769);Jones, W.R.(0000-0002-5493-4138) 20240319 20240325 observed Complete None planned CRMS Sites 0224 and 3166 -90.2944 -89.9098 29.8636 29.4845 ISO 19115 Topic Category biota None Louisiana Marsh Loss Coastal Restoration and Monitoring System Louisiana Drone Imagery USGS Metadata Identifier USGS:66709524d34e89718fa3f8f8 None Louisiana Marsh Loss None. Please see 'Distribution Info' for details. None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. William Jones U.S. Geological Survey Geographer physical

700 Cajundome Blvd

Lafayette LA 70506 USA 337-266-8581 jonesb@usgs.gov To ensure accuracy, data was reviewed by Camille Stagg who is the lead project manager for this study. Camille is very familiar with these marshes that have been recently affected by the diebacks. The data are polygon vector data. Data registration was checked against other raster data for registration accuracy. Data classification was reviewed and verified to be valid and accurate. Data set is considered complete for the information presented for the study area, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. Image data was acquired using unmanned aerial vehicles (UAV/3DR Solo) at an altitude of 400 feet (AGL) and a speed of 10mph. The data sensor was a natural color 3-band Ricoh GR II camera. Image data was acquired in flight every two seconds producing hundreds of images. These images were processed in Photoscan (Metashape) software to rectify and mosaic imagery into a seamless image. The images were also processed to create a digital terrain model to help model sea-level rise and subsidence. 20240612 William R. Jones U.S Geological Survey Southeast REgion Geographer mailing and physical

700 Cajundome Blvd

Lafayette LA 70506 United States 337-266-8581 337-266-8616 jonesb@usgs.gov Universal Transverse Mercator 16 0.9996 -93.0 0.0 500000.0 0.0 coordinate pair 0.6096 0.6096 meters NAD_1983_2011 GRS_1980 6378137.0 298.257222101 See individual metadata records for specific dataset information. none U.S. Geological Survey - ScienceBase mailing and physical

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 USA 1-888-275-8747 sciencebase@usgs.gov 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 on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Digital Data https://doi.org/10.5066/P1OHGKWF None 20240826 William R. Jones U.S. Geological Survey, Southeast Region Geographer mailing and physical

700 Cajundome Blvd

Lafayette LA 70506 United States 337-266-8581 337-266-8616 jonesb@usgs.gov FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata FGDC-STD-001.1-1999