CENCAL_BASELINE - Offshore Baseline for Central California Generated to Calculate Shoreline Change Rates

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).

本数据集依托地理信息系统（Geographic Information System, GIS），借助数字岸线分析系统（Digital Shoreline Analysis System, DSAS）3.0版本生成了长、短期岸线变化速率；该系统是一款用于计算岸线变化的ArcGIS扩展工具，相关参考资料为美国地质调查局（U.S. Geological Survey）2005-1304号公开文件报告，作者为Thieler, E.R.、Himmelstoss, E.A.、Zichichi, J.L.及Miller, T.M.。该扩展工具旨在协助用户高效完成岸线变化分析的核心流程。这款ArcGIS扩展工具包含三大核心功能模块：一是定义岸线基线，二是沿海岸以用户自定义的间距生成正交断面，三是计算岸线变化速率，具体计算方法包括线性回归法、端点速率法、速率平均值法、端点平均值法以及刀切法。