Shorelines Extracted from 1984-2015 Landsat Imagery: Petit Bois Island, Mississippi (Polyline: Individual Dates)

Shorelines Extracted from 1984-2015 Landsat Imagery: Petit Bois 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 our coastal resources.1984-2015年陆地卫星（Landsat）影像提取岸线：密西西比州小博伊斯岛（折线要素：单日期岸线）为线要素形状文件（shapefile），包含基于1984-2015年收集的卫星影像提取得到的岸线数据。该数据集所用卫星影像的采样频率与覆盖范围，均显著优于多数常规高分辨率地形测量成果。通过该影像可分析障壁岛地貌的多项核心特征，包括岛体规模、形态与空间位置，进而研判海岸侵蚀、土地流失及岛体裂解等现象。对上述特征演化规律的研究，有助于厘清未来障壁岛对气候变化、海平面上升及强风暴的响应机制，最终助力优化海岸资源管理工作。