MOA-derived Structural Feature Map of the Ronne Ice Shelf

Abstract: 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.摘要：本数据集提供了南极洲龙尼冰架（亦称菲尔希纳-龙尼冰架）的结构特征图。该制图工作隶属于龙尼冰架断裂扩展研究项目，研究重点聚焦埃文斯冰流。特征信息源自《南极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相关估算结果，包括冰流接地带、补给该冰架的冰川出水口、岛屿与冰隆的分布范围，以及冰架前缘位置；同时包含冰架内部观测到的各类构造特征，如冰流间缝合带、条纹线、裂隙（冰裂隙与冰裂谷）及褶皱类构造。各类特征可按点集形式提取，采用分组机制便于特征识别与绘图操作。数据集文件可通过文件传输协议（FTP）以ASCII文本（.txt）格式获取。附带一幅可移植文档格式（.pdf）图像文件，展示了本数据集包含的全部数据，该可视化结果由MATLAB绘制。此外，数据集还提供了可用于绘制该数据的MATLAB脚本。