zwitschi
72a50d8074
The OSM north edge measures 25.74 m, the sibling notes' own column spacing (5 bays x 4.96 m + one column) gives 25.70 m, and the photo framing agrees. The 29.6 m figure has no derivation and is dropped rather than averaged. The neighbour outlines overlap by 0.1-0.3 m, so they are traced shared walls, not approximate bubbles.