DOI: https://doi.org/10.57499/RESEARCH_2025_083
File name: GeoTerrain_Zone_ShapeFile_20250501.shp
Projection: JGD2000 (EPSG:4612)

The field attributes of ShapeFile are as follows.

CODE: Quarter Grid Square code
GeoGrp: Geologic group based on the Seamless Geological map V2 (AIST Geological Survey of Japan, 2023) considering engineering rock mass classification
TerrainG: Terrain group based on the J_Terrain16_V2 (terrain classification using 30-m DEM; Iwahashi, 2025) considering depth to bedrock and slope gradient
red_percen: Percentage of the sediment disaster special hazard zones (MLIT, 2024) in the National Land Numerical Information as of fiscal year 2023 (Please note that this is not identical to the current area)
J1D1_perce: percentages of J1 (immature volcanic ejecta soil) and D1 (immature Andosol) in the 1:200,000 soil map (the soil inventory of NARO) (Ohara et al., 2016)
Zone: Zone that considers vulnerability to landslides during earthquakes

Zone numbers and explanations are as follows.

0: Slopes where the majority of the area is gently sloping such as alluvial plains, terraces, and alluvial fans, and where the sediment disaster special hazard zones as of fiscal year 2023 is not included in the grid
1: Slopes that include the sediment disaster special hazard zones as of fiscal year 2023, although the majority of the slopes are gentle as in Zone 0
2: Slopes where unconsolidated mountains or hilly mountains to hilly terraces, or relatively new-age tephra-origin soils are placed on mountains or hills
3: Hilly terraces and debris valleys, etc. formed by soft rocks
4: Hilly mountains formed by layered soft rocks
5: Mountains and hilly mountains formed by soft rocks of massive bedrock (less influenced by tephra) or mountains formed by layered soft rocks
6: Mountains, hilly mountains, hilly terraces, debris valleys, etc. formed by hard and medium-hard rocks



