Digital Shoreline Analysis System (DSAS) version 4.3 Transects with Long-Term Linear Regression Rate Calculations for the Sheltered East Beaufort Sea coast of Alaska between the U.S. Canadian Border and the Hulahula River

This dataset consists of long-term (~63 years) shoreline change rates for the north coast of Alaska between the U.S. Canadian Border and the Hulahula River. Rate calculations were computed within a GIS using the Digital Shoreline Analysis System (DSAS) version 4.3, an ArcGIS extension developed by the U.S. Geological Survey. Long-term rates of shoreline change were calculated using a linear regression rate-of-change method based on available shoreline data between 1947 and 2010. A reference baseline was used as the originating point for the orthogonal transects cast by the DSAS software. The transects intersect each shoreline establishing measurement points, which are then used to calculate long-term rates.

本数据集包含美加边境至胡拉胡拉河之间阿拉斯加北海岸长达约63年的海岸线变化速率数据。其速率计算依托地理信息系统（Geographic Information System, GIS）平台，采用美国地质调查局（U.S. Geological Survey）开发的ArcGIS扩展工具——数字海岸线分析系统（Digital Shoreline Analysis System, DSAS）4.3版本完成。本次海岸线变化长期速率的计算基于1947年至2010年的可用海岸线数据，采用线性回归变化速率法实现。DSAS软件生成的正交断面以参考基线作为起始原点，这些断面与各海岸线相交以确定测量点，后续通过该测量点即可计算得到长期变化速率。