3Dビューアを準備中...
Missions for Discovery
Switch modes and explore with guiding questions to read the landscape.
Climb the Mountain Fortress
From the view at the fortress, think about why it was built there.
Walk Through the City
How wide is the plain compared to your city? Is it a suitable size for urban growth?
Find the Defensive Design
Can you identify all terrain-based defenses that protected Dazaifu?
Look from the North
If you were the Mongol army, where would you choose to land?
Discovery Guide
A 3D terrain model is not only for viewing, but for reading. Use these tips to discover the story of the land.
Reveal with Light
Set the sun to morning or evening to create long shadows that highlight subtle landforms—similar to how archaeologists detect sites in aerial imagery.
Read the Terrain
Ridges and valleys, river meanders, and terrace edges are key clues that shaped where people settled.
Walk in Explorer Mode
Check what is visible from where you stand: “Can I see the sea or town from here?” “What appears after crossing a ridge?” Use lines of sight as evidence.
Survey in Giant Mode
From above, focus on rivers, plains, and boundaries between highlands and lowlands. Look for easy routes and defensible chokepoints (ridge lines, valley mouths).
Data Sources
- Terrain Data
- GSI Fundamental Geospatial Data (DEM)
- Processing
- Blender → glTF 2.0 (GLB)
- Rendering
- Three.js / React Three Fiber
- License
- Compliant with the Geospatial Information Authority of Japan terms