floor elevation
FIRST FL 93.2593.25 ft
Main Street lower-corner datum
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)Original sheet identity has not yet been reconciled.
Extraction: Reviewed · extraction partial. Partial: façade opening identities/counts and selected printed datums. Drawing number, registration and opening dimensions still unresolved. Partial timed visual review: Source-local photographed design detail; no installed quantity, accepted geometry or world placement authorized. Partial timed visual review: Source-local photographed drawing evidence only; stacked marks are interpreted as drawing references, not historical entrance identifiers. No installed quantities or accepted geometry. Partial timed visual review: Three sequential views: sips locator displayed sideways because of EXIF handling, then correct raw raster rotation90 clockwise lower region and targeted handwritten grade glyph. New regions refer to correct 3024×4032 upright raster; no historic grade digit guessed. Partial timed visual review: One sideways master locator only; lettering requires 90 degrees clockwise. Intended grade/parapet region not reached within ten-call budget. Existing envelope text reused; no new numeric receipt. Partial timed visual review: Source-local derivative corroboration only.
Highlighted reading: FIRST FL 93.25. Main Street lower-corner datum
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Scroll or pinch to inspect this drawing. The gold outline locates the selected reading. Archival drawing photograph · Oregon Historical Society research collections.
Open source image separately ↗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.
93.25 ft
Main Street lower-corner datum