FL_INTERSECTS - Transect-Shoreline Intersection Points for Florida Generated to Calculate Shoreline Change Rates

Rates of long-term and short-term shoreline change were generated in a GIS with the Digital Shoreline Analysis System (DSAS) version 2.0, an ArcView extension developed by the U.S. Geological Survey (USGS) in cooperation with TPMC Environmental Services. The extension is designed to efficiently lead a user through the major steps of shoreline change analysis. This extension to ArcView contains three main components that define a baseline, generate orthogonal transects at a user-defined separation along the coast, and calculate rates of change (linear regression, endpoint rate, average of rates, average of endpoints, jackknife).本研究借助地理信息系统（Geographic Information System，GIS）与数字岸线分析系统（Digital Shoreline Analysis System，DSAS）2.0版生成了长短期岸线变化速率数据集，该系统是由美国地质调查局（U.S. Geological Survey，USGS）联合TPMC环境服务公司开发的ArcView扩展工具。该扩展工具旨在帮助用户高效完成岸线变化分析的核心步骤，包含三大核心功能模块：一是划定岸线基线，二是沿海岸以用户自定义间隔生成正交断面，三是计算岸线变化速率，涵盖线性回归、端点速率、速率平均值、端点平均值以及刀切法五种计算方法。