Dataset and GIS workflow for seismic hazard and liquefaction susceptibility mapping of Greater Chennai

This dataset contains the input, intermediate, and output files used in the study “Integrated seismic hazard and liquefaction susceptibility mapping of a coastal megacity: A GIS-based first-level assessment.” The repository includes:(i) aggregated ward-level groundwater data used for interpolation,(ii) AHP pairwise comparison matrix and derived weights,(iii) GIS layers including surface-level PGA, liquefaction susceptibility, and final seismic hazard classification,(iv) interpolated groundwater depth raster,(v) QGIS project file and workflow documentation. Geological and geomorphological source datasets were obtained from the Geological Survey of India (GSI) Bhukosh portal and are not redistributed here due to data policy restrictions. However, all derived layers and processing steps required for reproducibility are included. The dataset supports reproducibility of the first-level hazard assessment at the city scale.本数据集包含研究《沿海特大城市综合地震灾害与液化易发性制图：基于地理信息系统（Geographic Information System, GIS）的一级评估》中使用的输入、中间及输出文件。 本数据集仓库包含以下内容：(i) 用于插值的聚合街区级地下水数据；(ii) 层次分析法（Analytic Hierarchy Process, AHP）两两比较矩阵及导出权重；(iii) 包含地表峰值地面加速度（Peak Ground Acceleration, PGA）、液化易发性及最终地震灾害分类结果的地理信息系统图层；(iv) 插值得到的地下水深度栅格数据；(v) QGIS（Quantum GIS）项目文件与工作流程文档。 地质与地貌学源数据集取自印度地质调查局（Geological Survey of India, GSI）的Bhukosh门户，因数据政策限制，本数据集未重新分发此类源数据。但为确保研究可复现性所需的所有衍生图层与处理步骤均已包含在内。 本数据集可支撑城市尺度一级灾害评估的可复现研究。