MOA-derived Structural Feature Map of the Ronne Ice Shelf

This data set provides a structural feature map of the Ronne Ice Shelf in Antarctica (also known as the Filchner-Ronne Ice Shelf). The map was developed as part of a project to study fracture propagation in the Ronne Ice Shelf, with special focus on the Evans Ice Stream. Features were digitized from the MODIS Mosaic of Antartica (MOA), a composite of individual Moderate Resolution Imaging Spectradiometer (MODIS) images taken between 20 November 2003 and 29 February 2004, with an effective resolution of 125 m. The data set includes estimates of the shelf boundary, including ice stream grounding zones, outlets of glaciers feeding the shelf, extents of islands and ice rises, and the location of the shelf front, and features observed within the shelf, including suture zones between ice streams, streaklines, fractures (crevasses and rifts), and fold-like features. Individual features can be extracted as a group of points and grouping is used to facilitate identification and plotting.

Data files are available via FTP in ASCII text (.txt) format. One image file, in Portable Document Format (.pdf), shows the data included in the dataset, plotted using MATLAB. The data set also provides a MATLAB script which can be used to plot the data.

本数据集提供了南极洲龙尼冰架（Ronne Ice Shelf，又称菲尔希纳-龙尼冰架（Filchner-Ronne Ice Shelf））的结构特征图。该图为龙尼冰架断裂传播研究项目的成果之一，研究重点特别聚焦于埃文斯冰流（Evans Ice Stream）。数据特征源自《南极洲MODIS镶嵌图》（MODIS Mosaic of Antarctica, MOA），该镶嵌图由2003年11月20日至2004年2月29日期间采集的多幅中等分辨率成像光谱仪（Moderate Resolution Imaging Spectradiometer, MODIS）影像合成，有效分辨率达125米。
本数据集涵盖冰架边界的相关估算数据，包括冰流接地带、补给冰架的冰川出口、岛屿与冰隆的分布范围，以及冰架前缘的位置；同时包含冰架内部观测到的各类特征，如冰流间的缝合带、流线带、裂隙（冰裂缝与冰裂谷）及褶皱类构造。单个特征可作为点集提取，并通过分组操作便于识别与绘图。
数据文件以ASCII文本格式（.txt）通过文件传输协议（FTP）提供。另有一份可移植文档格式（Portable Document Format, .pdf）的图像文件，展示了本数据集包含的经MATLAB绘图后的结果。本数据集同时附带可用于绘制该数据的MATLAB脚本。