SOCAL_TRANSECTS_LT - Long-Term Shoreline Change Rates for Southern California Generated at a 50m Transect Spacing, 1852-1998

Rates of long-term and short-term shoreline change were generated in a GIS using the Digital Shoreline Analysis System (DSAS) version 3.0; An ArcGIS extension for calculating shoreline change: U.S. Geological Survey Open-File Report 2005-1304, Thieler, E.R., Himmelstoss, E.A., Zichichi, J.L., and Miller, T.M. The extension is designed to efficiently lead a user through the major steps of shoreline change analysis. This extension to ArcGIS 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).

本数据集借助地理信息系统（Geographic Information System, GIS），采用数字岸线分析系统（Digital Shoreline Analysis System, DSAS）3.0版，生成了长、短期岸线变化速率；该系统是一款用于计算岸线变化的ArcGIS扩展模块，相关参考文献为美国地质调查局开放文件报告2005-1304，作者为Thieler, E.R.、Himmelstoss, E.A.、Zichichi, J.L.及Miller, T.M.。该扩展模块旨在高效引导用户完成岸线变化分析的主要流程步骤。此ArcGIS扩展模块包含三大核心组件，可分别实现岸线基线划定、沿海岸以用户自定义间距生成正交断面，以及岸线变化速率计算，具体方法涵盖线性回归法、端点速率法、速率平均值法、端点平均值法及刀切法。