September 2007 Southwest Florida Division of Emergency Management Lidar-Derived Dune Crest, Toe and Shoreline

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 2007 Southwest Florida Division of Emergency Management 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.

《国家海岸变化灾害评估》项目的风暴诱发海岸变化灾害研究子项，旨在解析极端风暴对砂质海滩的影响量级与变异性特征。通过激光雷达（Lidar）提取的海滩地貌特征（包括沙丘脊线、沙丘坡脚与海岸线），可用于界定海滩对风暴影响的脆弱性水平。本数据集基于2007年佛罗里达州西南部应急管理部的激光雷达勘测数据，确定了向海最外侧沙丘脊线、沙丘坡脚的高程与位置，以及平均高潮位海岸线的相关参数。数据集同步纳入海滩宽度指标，其定义为沿横岸剖面测得的沙丘坡脚与海岸线之间的水平距离。海滩坡度则通过该海滩宽度，结合海岸线与沙丘坡脚的高程计算得到。