7.5-Arc-Second Japan Engineering Geomorphologic Classification Map

Japan Engineering Geomorphologic Classification Map (JEGM) is a systematically standardized GIS-based ground-condition map containing attributes of geomorphologic classification in grid cells of 7.5 arc-seconds in latitude × 11.25 arc-seconds in longitude for Japan nationwide. The JEGM includes twenty-four geomorphologic units which are based on a new engineering-based geomorphologic classification scheme for identifying and classifying subsurface ground conditions.

日本工程地貌分类图（JEGM）是一项基于地理信息系统（GIS）的、系统化的标准化地面条件地图，该地图包含日本全国范围内，以纬度7.5弧秒、经度11.25弧秒为网格单元的地貌分类属性。JEGM涵盖了基于新型工程地貌分类方案的二十四种地貌单元，旨在识别和分类地下地面条件。