OuterCapeCod_shorelines.shp - Shorelines used to calculate shoreline change statistics from the Outer Cape Cod coastal region from Long Point in Provincetown to Monomoy Island, Massachusetts.

Due to continued coastal population growth and increased threats of erosion, current data on trends and rates of shoreline movement are required to inform shoreline and floodplain management. The Massachusetts Office of Coastal Zone Management launched the Shoreline Change Project in 1989 to identify erosion-prone areas of the coast. In 2001, a 1994 shoreline was added to calculate both long- and short-term shoreline change rates at 40-meter intervals along ocean-facing sections of the Massachusetts coast.

The Coastal and Marine Geology Program of the U.S. Geological Survey (USGS) in cooperation with the Massachusetts Office of Coastal Zone Management, has compiled reliable historical shoreline data along open-facing sections of the Massachusetts coast under the Massachusetts Shoreline Change Mapping and Analysis Project 2013 Update. Two oceanfront shorelines for Massachusetts (approximately 1,800 km) were (1) delineated using 2008/09 color aerial orthoimagery, and (2) extracted from topographic LIDAR datasets (2007) obtained from NOAA's Ocean Service, Coastal Services Center. The new shorelines were integrated with existing Massachusetts Office of Coastal Zone Management (MA CZM) and USGS historical shoreline data in order to compute long- and short-term rates using the latest version of the Digital Shoreline Analysis System (DSAS).

伴随沿海人口持续增长与海岸侵蚀威胁加剧，当前亟需获取海岸线迁移趋势与速率的相关数据，为海岸线及洪泛区管理提供决策支撑。马萨诸塞州沿海区域管理办公室（Massachusetts Office of Coastal Zone Management）于1989年启动海岸线变化项目（Shoreline Change Project），旨在识别沿海易侵蚀区域。2001年，项目新增1994年海岸线数据，以40米为间隔计算马萨诸塞州沿海面向大洋区段的长期与短期海岸线变化速率。
美国地质调查局（U.S. Geological Survey, USGS）沿海与海洋地质项目组与马萨诸塞州沿海区域管理办公室合作，依托《马萨诸塞州海岸线变化制图与分析项目2013年更新报告》，整理了马萨诸塞州沿海开放面向区段的可靠历史海岸线数据集。其中覆盖马萨诸塞州约1800公里沿海区域的两条岸线，一是通过2008/2009年彩色航空正射影像（color aerial orthoimagery）划定，二是从美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）海洋服务局海岸服务中心获取的2007年地形激光雷达（LIDAR）数据集中提取。新划定的岸线已与马萨诸塞州沿海区域管理办公室（MA CZM）及USGS的现有历史海岸线数据集完成整合，以借助最新版数字海岸线分析系统（Digital Shoreline Analysis System, DSAS）计算海岸线的长期与短期变化速率。