building diagram; architectural elevation drawing
A technical term in traditional Japanese architecture for a diagram showing the vertical layout or elevation of a building.
This building diagram shows the positions and heights of the pillars in detail.
立面図 is a modern architectural term for elevation drawing, whereas 建ち絵図 is a traditional Japanese term.
Compound of 建ち (tachi, 'standing' or 'building', from 建つ) and 絵図 (ezu, 'illustrated diagram'). The exact historical derivation is uncertain, but the term is used in traditional Japanese carpentry and architecture.