NORCAL_INTERSECTS_ST - Short-Term Transect-Shoreline Intersection Points for Northern 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).

本研究通过地理信息系统（Geographic Information System，GIS），采用数字岸线分析系统（Digital Shoreline Analysis System，DSAS）3.0版本生成长、短期岸线变化速率；该用于计算岸线变化的ArcGIS扩展工具出自美国地质调查局（U.S. Geological Survey）公开文件报告2005-1304，作者为Thieler, E.R.、Himmelstoss, E.A.、Zichichi, J.L.与Miller, T.M.。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，其包含三大主要功能模块：一是划定基线，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（jackknife））。