Illustrative Orientation
Whole structure
Fixture Observation Tower
Schematic anchor only; outline is not a measured section, elevation, or construction drawing.
LAB / BUILDING ANATOMY / APU019
Open the building without inventing what is inside.
Building Anatomy maps only the components, spaces, materials, and classifications that current APU evidence can actually support.
Synthetic APU019 Building Anatomy fixture. It demonstrates evidence boundaries and schematic anatomy only; it is not a factual drawing of a real building.
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.
ILLUSTRATIVE ANATOMY MAP — NOT A CONSTRUCTION DRAWING
Fixture Observation Tower
The stack separates evidence categories visually. It does not claim that these parts occupy the drawn positions or that omitted systems do not exist.
Evidenced relationship · Space
Fixture Observation Hall
The interior is evidenced as part of the structure. Exact vertical or plan position is not asserted.
- Entity ID
- apu:interior:fixture-observation-hall
- Relationship
- part_of · apu:rel:hall-part-tower
- Placement
- Relationship Only
- Source
- apu:source:apu001-fixture-spec
Evidenced relationship · Architectural Element
Fixture Arcade Screen
The structure contains this independent element entity. Exact façade zone, attachment, or assembly is unknown.
- Entity ID
- apu:architectural_element:fixture-arcade-screen
- Relationship
- contains_element · apu:rel:tower-element
- Placement
- Relationship Only
- Source
- apu:source:apu001-fixture-spec
Evidenced relationship · Material Context
Fixture Blue Brick
The structure uses this material in current Graph evidence, but APU does not know where it is located or how it is assembled.
- Entity ID
- apu:material:fixture-blue-brick
- Relationship
- uses_material · apu:rel:tower-material
- Placement
- Unknown
- Source
- apu:source:apu001-fixture-spec
Evidenced relationship · Classification Context
Fixture Ribbed Modernism
Style is contextual classification, not a physical anatomy layer.
- Entity ID
- apu:style_or_movement:fixture-ribbed-modernism
- Relationship
- style_of · apu:rel:tower-style-ribbed
- Placement
- Not Applicable
- Source
- apu:source:apu001-fixture-spec
Evidenced relationship · Classification Context
Fixture Observation Tower Typology
Typology is contextual classification, not a physical anatomy layer.
- Entity ID
- apu:typology:fixture-observation-tower-typology
- Relationship
- typology_of · apu:rel:tower-typology
- Placement
- Not Applicable
- Source
- apu:source:apu001-fixture-spec
ACCESSIBLE EVIDENCE LEDGER
Stable IDs survive the diagram.
Independent APU entities remain independent. The visual does not collapse them into anonymous sub-objects.
| Entity | Role | Stable entity ID | Graph evidence | Placement claim | Source |
|---|---|---|---|---|---|
| Fixture Observation Hall | Space | apu:interior:fixture-observation-hall | part_of apu:rel:hall-part-tower | Relationship Only | apu:source:apu001-fixture-spec |
| Fixture Arcade Screen | Architectural Element | apu:architectural_element:fixture-arcade-screen | contains_element apu:rel:tower-element | Relationship Only | apu:source:apu001-fixture-spec |
| Fixture Blue Brick | Material Context | apu:material:fixture-blue-brick | uses_material apu:rel:tower-material | Unknown | apu:source:apu001-fixture-spec |
| Fixture Ribbed Modernism | Classification Context | apu:style_or_movement:fixture-ribbed-modernism | style_of apu:rel:tower-style-ribbed | Not Applicable | apu:source:apu001-fixture-spec |
| Fixture Observation Tower Typology | Classification Context | apu:typology:fixture-observation-tower-typology | typology_of apu:rel:tower-typology | Not Applicable | apu:source:apu001-fixture-spec |
UNKNOWN FIELD
Unknown / not evidenced systems
APU records gaps explicitly instead of filling them with plausible-looking construction details.
Unknown / not evidenced
Foundations
No explicit foundation entity, relationship, drawing, or sourced statement exists in current APU evidence.
Unknown / not evidenced
Primary structural system / load path
No explicit structural-system evidence exists. The tower name, height, or illustrative graphics cannot establish a load path.
Unknown / not evidenced
Envelope / wall build-up
A material-use relationship does not establish layer order, thickness, substrate, insulation, or façade assembly.
Unknown / not evidenced
Circulation
Program and interior records do not establish stairs, lifts, ramps, entries, or movement sequence.
Unknown / not evidenced
Mechanical / electrical / plumbing systems
No services evidence exists in the current fixture.
Unknown / not evidenced
Connections / joints / construction sequence
No technical source establishes connections, joints, fabrication, erection, or construction sequence.
BOUNDARIES
What anatomy can and cannot mean.
These rules stay attached when the system later receives real buildings, drawings, and technical sources.
Material use ≠ location
Blue brick is Graph-backed as a used material, but no façade, interior, thickness, or assembly location is inferred.
Part-of ≠ exact position
The observation hall is part of the structure, but APU019 does not assign a floor, height, orientation, or circulation path.
Element ≠ assembly
The arcade screen remains an independent element entity. Its fixings, substrate, joints, and load behavior are unknown.
Open evidence questions
- Which reviewed drawings or technical sources can establish real assemblies?
- Can a future interior record locate the observation hall without inferring from imagery?
- Which material locations and junctions are explicitly documented?