Lidar-derived Beach Morphology (Dune Crest, Dune Toe, and Shoreline) for U.S. Sandy Coastlines

The U.S. Geological Survey (USGS)Coastal Change Hazards Technical Capabilities and Applications (TCA) project aims to identify areas of the nation’s coastline that are most vulnerable to extreme storms and long-term shoreline change. These assessments require coastal elevation data across diverse geographic regions and covering a time span of many years. The datasets published here, organized by individual field activity numbers (FANs), define the dune crest (denoted by DC in the feature_type attribute), dune toe (denoted by DT in the feature_type attribute), and shoreline (denoted by SL in the feature_type attribute) at 10 meters (m) intervals alongshore for each processed lidar elevation survey. Beach width and beach slope as calculated from dune toe to shoreline are also included at each shoreline location.

Note: This data release was versioned on January 15, 2026. Please see the Suggested Citation section for details.

美国地质调查局（U.S. Geological Survey, USGS）海岸变化灾害技术能力与应用（Technical Capabilities and Applications, TCA）项目，旨在识别美国海岸线上最易受极端风暴与长期岸线变化影响的区域。开展此类评估需要覆盖多样地理区域、跨度多年的海岸高程数据。本次发布的数据集按单个野外活动编号（Field Activity Numbers, FANs）进行组织，为每一项经处理的激光雷达（lidar）高程测量成果，定义了沿岸以10米（m）为间隔的沙丘脊线（要素类型属性中记为DC）、沙丘坡脚（要素类型属性中记为DT）与岸线（要素类型属性中记为SL）。此外，还包含每个岸线位置处由沙丘坡脚至岸线计算得到的海滩宽度与海滩坡度。

注意：本数据发布版本于2026年1月15日更新。详细信息请参阅"推荐引用"部分。