Every dimension belongs to an object and a drawing. Original room numbers, object marks, printed values and source regions stay together—even when the answer is unresolved.
464 of 464 photographs have extraction records, containing 27,517 properties. Initial image review is not exhaustive extraction: 0 photographs have passed the full-region check. 66 numbered sheets are reconciled. Modeling and architectural registration are separate work; these counts do not establish a complete building.
Download the structured register (JSON)Object: W409 roof high-point reference
Printed values, calculations, image traces and observed counts are different kinds of evidence. “Verified” applies to the specific reading—not to the whole room or model.
195.42 ft
Printed high-point datum; not low-court roof and not a universal column-top elevation.
Drawing notation: ROOF H.P. EL. 195.42
195.416667 ft
Arithmetic check: 185.25 + 10'-2" = 195.4166667, which rounds to the separately printed EL. 195.42.
Drawing notation: 8TH · 10'-2" · ROOF H.P. EL. 195.42
Calculated from: w409-level-8-elevation, w409-eighth-to-roof-high-point-interval
0.003333 ft
Rounding residual only; it is not a geometric tolerance or a source conflict.
Drawing notation: ROOF H.P. EL. 195.42 · 10'-2"
Calculated from: w409-roof-high-point-elevation, w409-roof-high-point-elevation-from-chain
Source inventory is separate from the floor filters above. Select one drawing to inspect it; no drawing set is preloaded.