Shapefile of interpreted sedimentary environments for the Long Island Sound mapping project Phase II

This data set contains interpreted polygons describing different sedimentary environments of the Long Island Sound mapping project Phase II. This data set is the result of manual interpretation of detailed bathymetry data and resulting seafloor morphology, backscatter data, sediment core analysis results, and interpretation of sub-bottom data.The outline of polygons was based on manual interpretation mostly following morphological and backscatter boundaries. Interpretation was cross-checked with sediment grab and core information. Polygon outlines are based on morphology and backscatter data that have 1 m pixel resolution, but interpretation could be several pixels (~ +/-10 m) in each direction, since the exact boundary is not always clear. Small pockets of different environments might not have been distinguished. The data is presented here as an ESRI shapefile in UTM-18 N projection. Funding was provided by the Long Island Sound Mapping Fund administered cooperatively by the EPA Long Island Sound Study and the Connecticut Department of Energy and Environmental Protection (DEEP).

本数据集包含用于描述长岛海峡（Long Island Sound）第二阶段测绘项目中不同沉积环境的解译多边形。本数据集系对详细水深数据、对应海底地貌、反向散射数据、沉积物岩心分析结果及次海底剖面数据开展人工解译的成果。多边形轮廓主要依据人工解译结果，以地貌与反向散射边界为基准，且解译过程已通过沉积物采泥与岩心资料进行交叉验证。多边形轮廓基于分辨率为1米像素的地貌与反向散射数据绘制，但由于确切边界往往难以明确，解译结果在各方向上可能存在数个像素的偏差（约±10米）。小型的不同沉积环境斑块可能未被区分识别。本数据集以UTM-18北投影下的ESRI形状文件（ESRI shapefile）格式提供。本数据集的资助资金来自长岛海峡测绘基金，该基金由美国环境保护署（EPA）长岛海峡研究项目与康涅狄格州能源与环境保护部（Connecticut Department of Energy and Environmental Protection, DEEP）联合管理。