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: Street gas main
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.
4 in
Selected source evidence only; partial locator review. Applies to depicted historical drawing, not accepted building geometry.
Drawing notation: 4" Gas Main
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.
Drawing notation: Top is 2.0 ft deep [decimal unresolved]
Selected source evidence only; partial locator review. Applies to depicted historical drawing, not accepted building geometry.
2 ft
Drawing-specific detail or historical survey evidence; installed instance and geometry not established.
Drawing notation: Top is 2.0 ft. deep
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.