Shorelines Extracted from 1984-2015 Landsat Imagery: Cat Island, Mississippi (dates_meta.txt)

Shorelines Extracted from 1984-2015 Landsat Imagery: Cat Island, Mississippi (Polyline: Individual 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）影像提取的岸线：密西西比州卡特岛（折线要素：按单日期区分）为线状形状文件（shapefile），其所表征的岸线由1984年至2015年采集的卫星影像生成。该数据集所用卫星影像的采样频率与覆盖范围，均远高于多数常规高分辨率地形测绘。通过此类影像可提取障壁岛（barrier island）形态的多项核心特征，包括岛体尺寸、形态与空间位置，这些特征可用于反映岸线侵蚀、土地流失及岛体分裂等现象。对上述特征的演化过程开展研究，有助于理解障壁岛未来对气候变化、海平面上升及强风暴的响应机制，进而助力优化海岸资源管理工作。