SC_TRANSECTS_ST - Short-Term Shoreline Change Rates for South Carolina Atlantic Coast Generated at a 50m Transect Spacing, 1962-2000

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 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).

本研究依托地理信息系统（Geographic Information System, GIS），借助美国地质调查局（United States Geological Survey, USGS）与TPMC环境服务公司联合开发的ArcView扩展工具——数字岸线分析系统（Digital Shoreline Analysis System, DSAS）2.0版，生成了长期与短期岸线变化速率数据集。该扩展工具旨在高效引导用户完成岸线变化分析的核心步骤。这款ArcView扩展工具包含三大核心组件：其一用于划定基准岸线，其二可沿海岸生成用户自定义间隔的正交断面，其三能够计算岸线变化速率，具体方法包括线性回归、端点速率法、速率平均值法、端点平均值法以及刀切法（jackknife）。