FL_TRANSECTS_LT - Long-Term Shoreline Change Rates for Florida Generated at a 50m Transect Spacing, 1855-2001

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).本研究通过地理信息系统（Geographic Information System，GIS）结合数字海岸线分析系统（Digital Shoreline Analysis System，DSAS）2.0版本，生成了长期与短期海岸线变化速率。该系统是由美国地质调查局（U.S. Geological Survey，USGS）与TPMC环境服务公司联合开发的ArcView扩展模块。此扩展模块旨在高效引导用户完成海岸线变化分析的主要步骤，包含三大核心功能：定义基线、沿海岸以用户自定义间隔生成正交断面，以及计算变化速率（涵盖线性回归法、端点速率法、速率平均值法、端点平均值法与刀切法）。