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: detail 1131 basement hatch
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.
84 in
Printed basement clear hatch width; rough enclosure width differs.
Drawing notation: 7'-0"
Printed basement clear hatch width; rough enclosure width differs.
120 in
Basement longitudinal clear-hatch witness. No first-floor shaft width or accepted world coordinates imported.
Drawing notation: 10′-0″ CLEAR HATCH
Basement longitudinal clear-hatch witness. No first-floor shaft width or accepted world coordinates imported.
Source inventory is separate from the floor filters above. Select one drawing to inspect it; no drawing set is preloaded.