Sourced Height. Shared canvas shows one-dimensional length magnitude only; semantic kind remains Height.
LAB / SCALE EXPLORER / APU018
Scale without guessing.
See sourced dimensions against a common reference while keeping height, span, and other architectural quantities semantically distinct.
Synthetic development scale exercise. It demonstrates evidence handling and must not be published.
Task-oriented Lab
Choose the operation, not the page name.
Every Lab tool now uses the same context convention: an optional worked-example key travels in the URL, help is visible in native disclosure controls, and reset returns to the canonical tool route.
Worked-example context is optional and URL-scoped. Enter from the Harbor Light synthetic journey to carry that example between tools, or use any tool without a case key.
ToolAnatomySee how a structure is assembled from explicitly modeled parts.ToolRelationshipsTrace explicit links without turning proximity or chronology into influence.ToolScaleCompare documented measurements while leaving missing dimensions unknown.ToolTime layersRead explicit events and lifecycle states without inventing undocumented in-between states.ToolJourney builderAssemble an evidenced sequence while keeping routing, distance, access, and walkability separate.
How Lab context and reset work
Context is explicit and URL-scoped. The Expedition layer does not create an account profile, hidden personalization state, analytics event, or factual assertion. A ?case=harbor-light key only keeps the same synthetic teaching example visible as you move between tools. Reset by returning to this tool's base route.
LINEAR REFERENCE CANVAS
Different dimensions, one length reference.
The bars share a 160 m one-dimensional scale only. They do not turn height and span into the same architectural quantity.
Sourced Span. Shared canvas shows one-dimensional length magnitude only; semantic kind remains Span.
Contract-defined orientation reference
Illustrative human reference
1.7 m · Contract-defined 1.70 m reference marker for visual orientation only. It is not evidence about any APU entity or actual visitor.
ACCESSIBLE EVIDENCE LEDGER
Every visual value, in text.
This table is the complete semantic equivalent of the scale graphic.
| Entity / requested dimension | Evidence state | Original source value | Display conversion | Source | Interpretation |
|---|---|---|---|---|---|
| Fixture Observation Tower — Height | Evidenced | 84.5 m — Height | 277.2 ft derived display conversion; factor 3.280839895013123 | apu:source:apu001-fixture-measurements | Sourced Height. Shared canvas shows one-dimensional length magnitude only; semantic kind remains Height. |
| Fixture Harbor Footbridge — Span | Evidenced | 142 m — Span | 465.9 ft derived display conversion; factor 3.280839895013123 | apu:source:apu001-fixture-measurements | Sourced Span. Shared canvas shows one-dimensional length magnitude only; semantic kind remains Span. |
| Fixture Observation Tower — Span | Unknown / not evidenced | — | — | — | No explicit Span measurement is present in current APU evidence. No estimate is made. |
| Fixture Harbor Footbridge — Height | Unknown / not evidenced | — | — | — | No explicit Height measurement is present in current APU evidence. No estimate is made. |
Conversion ledger
Original values remain authoritative. Converted values are derived display aids and are never written back as source evidence.
| Measurement | Original | Derived display | Method |
|---|---|---|---|
| Fixture Observation Tower Height | 84.5 m | 277.2 ft | × 3.280839895013123; rounded to 1 decimal place |
| Fixture Harbor Footbridge Span | 142 m | 465.9 ft | × 3.280839895013123; rounded to 1 decimal place |
What this explorer refuses to do
- Estimate
- No missing dimension is inferred from an image, name, typology, coordinate, or another dimension.
- Rank
- A longer line is not a better building, a more important work, or a winner.
- Flatten kinds
- Metres of height remain height; metres of span remain span.
- Leak location
- The Scale payload contains no Atlas coordinates.
CROSS-UNIVERSE COMPANION / ICUX-004
Continue from two architectural fixtures to 24 referenced anchors.
ICUX-004 extends scale comparison from microscopic structures through objects, buildings and astronomy while preserving dimension kinds, uncertainty and source-visible evidence.