elevation; elevation view
Technical term in architecture and drafting for a scale drawing of a building's vertical face.
Floor plans and elevation views are necessary for the blueprint.
断面図 is a cross-section drawing, showing internal structure, whereas 立面図 shows the external vertical face.
Compound of 立面 (りつめん, 'vertical face') and 図 (ず, 'drawing'). The term is a modern technical coinage.