All sites shorelines

This dataset represents the shoreline positions that were surveyed at the beginning and end of a one year study of erosion along the back barrier (western shoreline) of Cumberland Island National Seashore (CUIS). Additionally, this dataset also contains projected shoreline positions for the year 2050 and 2100 derived from erosion rates observed in this study and the R package - Analysis of Moving Boundaries Using R (AMBUR). To determine shoreline positions, points were surveyed along the edge of the margin scarp using either a Trimble R8 Real-Time Kinematic Global Positioning System (RTK GPS) unit, a Trimble S6 total station, or both. Points were then converted to a polyline feature to represent the position and configuration of the selected sites shoreline. The goal of this exercise was to estimate the net amount of retreat which could be compared to other methods that were being used in this study.

本数据集收录了坎伯兰岛国家海岸（Cumberland Island National Seashore, CUIS）障壁后缘（西侧岸线）为期一年的海岸侵蚀研究始末所实测的岸线位置。此外，本数据集还包含基于本研究观测得到的侵蚀速率，以及借助R语言程序包《基于R的移动边界分析》（Analysis of Moving Boundaries Using R, AMBUR）推算得到的2050年与2100年预测岸线位置。为确定岸线位置，研究人员沿岸缘陡崖边缘开展点位实测，所用设备包括天宝R8实时动态差分全球定位系统（Trimble R8 RTK GPS）、天宝S6全站仪（Trimble S6 total station），或二者组合使用。随后将实测点位转换为折线要素（polyline feature），以表征研究所选区域岸线的位置与形态。本次研究的目标为估算岸线净后退量，以便与本研究中采用的其他方法所得结果进行对比。