Visual Plane
every picture states the point it is correct from
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The thread: Taught, and never measured — page 6

The standard constructions are drawn here exactly as they are taught, and then asked what solid or what spacing they depict. Some answers are fine. The point is that the method itself supplies no way to find out, so nobody drawing knows which case they are in. Essays 121 to 121 of 121.
-7.50-5-2.5002.50012345678tile corner along the diagonal, from the near endsigned distance off the chord (px)the rule's arc, unpaintedthe rule painted: amplitude 0.84a construction painted: -0.178 braccia, 1 px of scatterone shape, one amplitude Drawn confidently

The rule's bow is read by its shape

A straightedge on a painted pavement's diagonal convicts the constant-ratio rule by the size of its corners' worst departure, and gives out once the painter's hand scatters by a third of the bow. The bow has more than a size. It is one smooth arc, to one side, fixed by the ratio, and a hand's scatter is neither. Fit that arc with one free amplitude and the rule is ranked above a construction 96 times in a hundred on five braccia at two pixels, where the straightedge managed 83 — and the reading holds to half the bow's size in scatter.

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