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

Shorelines Extracted from 1984-2015 Landsat Imagery: Ship Island, Mississippi (Polygon: Individual Dates) is a dataset consisting of 280 polygon shapefiles 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（单日期多边形）数据集包含280个多边形形状文件（shapefile），所有文件均基于1984至2015年采集的卫星影像提取得到，对应不同拍摄日期的海岸线。该数据集所用卫星影像的采样频率远高于多数常规高分辨率地形测绘，覆盖范围也更为广泛。通过这批影像可提取障壁岛地貌的多项核心特征参数，包括岛屿面积、形态与空间位置，借此可研判海岸侵蚀、土地流失及岛屿裂解等海岸演化现象。对上述特征演化规律的研究，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，进而助力海岸资源管理水平的提升。