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: Madison street sewer
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.
Selected source evidence only; partial locator review. Applies to depicted historical drawing, not accepted building geometry.
Drawing notation: Elevation of invert 80.0
Selected source evidence only; partial locator review. Applies to depicted historical drawing, not accepted building geometry.
Selected source evidence only; partial locator review. Applies to depicted historical drawing, not accepted building geometry.
Drawing notation: VITRIFIED SEWER PIPE
Selected source evidence only; partial locator review. Applies to depicted historical drawing, not accepted building geometry.
Numeric value unresolved
Selected source evidence only; partial locator review. Applies to depicted historical drawing, not accepted building geometry.
Selected source evidence only; partial locator review. Applies to depicted historical drawing, not accepted building geometry.
12 in
Drawing-specific detail or historical survey evidence; installed instance and geometry not established.
Drawing notation: 12" Vitrified Sewer Pipe (Public)
Drawing-specific detail or historical survey evidence; installed instance and geometry not established.
6 in
Drawing-specific detail or historical survey evidence; installed instance and geometry not established.
Drawing notation: 6" Y Branch
Drawing-specific detail or historical survey evidence; installed instance and geometry not established.
Source inventory is separate from the floor filters above. Select one drawing to inspect it; no drawing set is preloaded.