Shorelines Extracted from 1984-2015 Landsat Imagery: Ship Island, Mississippi (Polyline: Combined Dates)

Shorelines Extracted from 1984-2015 Landsat Imagery: Ship Island, Mississippi (Polyline: Combined Dates) is a line shapefile representing shorelines generated from satellite imagery that was collected from 1984 to 2015. The sample frequency of satellite imagery is much higher, and the coverage much greater, than most routine high-resolution topographic surveys. Certain aspects of barrier island morphology, such as island size, shape and position, can be determined from these images and can indicate erosion, land loss, and island breakup. Studying how these characteristics evolve will help develop an understanding of how barrier islands will respond to climate change, sea level rise, and major storms in the future and that will serve to improve management of coastal resources.

1984—2015年陆地卫星（Landsat）影像提取的海岸线：密西西比州希普岛（折线要素：综合日期）为线状形状文件（shapefile），其数据为基于1984年至2015年采集的卫星影像生成的海岸线成果。相较于多数常规高分辨率地形测量作业，该卫星影像的获取频次更高、覆盖范围更广。通过此类影像可提取障壁岛地貌的多项特征，包括岛屿规模、形态与空间位置，并可借此识别海岸侵蚀、土地流失及岛屿解体等现象。对上述特征的演化过程开展研究，有助于深化对障壁岛未来如何响应气候变化、海平面上升及强风暴事件的认知，进而为提升海岸资源管理水平提供支撑。