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: Page-left paired opening between mailing platform and vestibule
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.
Preserved printed reference candidate; not room number or assumed historic door ID. Denominator needs schedule crosswalk.
Drawing notation: 1/30
Preserved printed reference candidate; not room number or assumed historic door ID. Denominator needs schedule crosswalk.
2 count
Observed symbol count at this opening only; not installed quantity or width. Double arcs extend to both sides of the partition, a double-acting candidate.
Drawing notation: Two opposed leaf symbols
Observed symbol count at this opening only; not installed quantity or width. Double arcs extend to both sides of the partition, a double-acting candidate.
Opening interrupts the shared platform/vestibule boundary; exact jambs and partition construction remain unresolved. Fractional type marks preserved for later close crop rather than invented door or room numbers.
Drawing notation: MAILING PLATFORM / MAILING VESTIBULE
Opening interrupts the shared platform/vestibule boundary; exact jambs and partition construction remain unresolved. Fractional type marks preserved for later close crop rather than invented door or room numbers.
Literal circled numerator/denominator reference mark above same paired opening. Do not interpret as a length, quantity or historical room number. Source-local original-layer witness only; no installation, quantity or geometric acceptance.
Drawing notation: 1/30
Literal circled numerator/denominator reference mark above same paired opening. Do not interpret as a length, quantity or historical room number. Source-local original-layer witness only; no installation, quantity or geometric acceptance.
Observed original-layer opposed swing symbols in common boundary separating labeled platform above from labeled vestibule below. Source-local adjacency; no exact opening width, topology transform or room geometry. Source-local original-layer witness only; no installation, quantity or geometric acceptance.
Drawing notation: MAILING PLATFORM / MAILING VESTIBULE
Observed original-layer opposed swing symbols in common boundary separating labeled platform above from labeled vestibule below. Source-local adjacency; no exact opening width, topology transform or room geometry. Source-local original-layer witness only; no installation, quantity or geometric acceptance.
Source inventory is separate from the floor filters above. Select one drawing to inspect it; no drawing set is preloaded.