Divide space by the nearest point – how does the town look?
A figure contributed to a high school textbook for Geography, the Japanese subject Chiri Soga. It appears in the unit on maps and GIS, where Voronoi tessellation is introduced alongside buffering and network analysis as a method of spatial analysis used in GIS.
The figure comes in two parts. On the left, the principle: the generating points and the boundaries between them. On the right, the same applied to a real town. Colour the street network by the nearest generating point, and the territories divided by distance along the streets no longer match the Voronoi boundaries drawn as straight lines. On the map, it becomes visible that nearness comes in two kinds.
DATA
| Programme | Publication |
|---|---|
| Year | 2026 |
| QAI team | Drawing of the Voronoi figure (fig. 5) and its caption (QAI Ltd.) |
| Exhibited / Published | Teikoku-Shoin, New Geography for High Schools, 2026 edition (textbook no. 046-901) / AB format, 240 pp. / pp.24-25, Maps and GIS, fig. 5 |