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For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment-visit https://www.usgs.gov or call 1-888-ASK-USGS.For an overview of USGS information products, including maps, imagery, and publications, visit https://store.usgs.gov.iii Acknowledgments Rob Thieler and Bill Danforth developed the original Digital Shoreline Analysis System (DSAS) software in the early 1990s, and DSAS has undergone numerous updates and refinements over the past 25 years. DSAS version 5.0 is a culmination of many years of collaborative effort to refine the functionality of the software to meet the needs of a global user base. The authors wish to thank Rob Thieler for the idea that started it all, Amy Farris for converting all of the original MATLAB code to Python for this update, Jessica Zichichi, Ayhan Ergul, and Ouya Zhang from Corona Environmental for making this new version a reality, and the diverse user community for providing feedback, questions, and inspiration for ways to improve the DSAS workflow. v Contents XMLExtensible Markup Language

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