Digital Shoreline Analysis System (DSAS) version 4.3 Transects with Long-Term Linear Regression Rate Calculations for the Exposed 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.

本数据集包含美国与加拿大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。速率计算工作依托美国地质调查局（U.S. Geological Survey，USGS）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，在地理信息系统（Geographic Information System，GIS）环境中完成。本次研究基于1947年至2010年可获取的海岸线数据，采用线性回归变化速率法计算得到长期海岸线变化速率。DSAS软件布设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获取测量点位，随后利用这些点位计算长期海岸线变化速率。