April 1958 (fixture)
Fixture Studio Northline
Synthetic month-precision event.
explicit time event · 1 source referenceTIME / FOUNDATION
Places are states in motion, not frozen objects.
The first APU time model separates current lifecycle state from dated evidence, preserves coarse dates exactly as supplied, and treats built, altered, lost, and unrealized work as parts of the same temporal universe.
Spatial reasoning map
One world, six complementary ways to think.
Start with the question you have, then move between lenses. Each route changes the view, not the evidence contract.
01 / Timeline
Every point below exists because a chronology or explicit time-event record exists.
1961 (fixture)
Fixture Observation Tower
Synthetic development event used to test start/completion sequencing.
explicit time event · 1 source reference1964 (fixture)
Fixture Observation Tower
Derived from the entity chronology.
entity chronology · 1 source referencec. 1972 (fixture)
Fixture Harbor Footbridge
Synthetic approximate date proving that circa evidence stays approximate.
explicit time event · 1 source reference1973 (fixture)
Fixture Sea Arcology
Synthetic proposal event for an unrealized project.
explicit time event · 1 source reference1976 (fixture)
Fixture Sea Arcology
Synthetic explicit state transition. The transition is evidence on this event, not inferred from the entity lifecycle field.
explicit time event · 1 source reference · explicit state: Conceptual → Unbuilt1979 (fixture)
Fixture Glass Market
Synthetic pre-demolition damage event.
explicit time event · 1 source reference1982 (fixture)
Fixture Glass Market
Derived from the entity chronology.
entity chronology · 1 source reference1990s (fixture)
Fixture Observation Tower
Synthetic coarse decade event; precision must not be upgraded.
explicit time event · 1 source reference3 May 2001 (fixture)
Fixture Harbor City
Synthetic day-precision event used only to test preservation of exact evidence when it exists.
explicit time event · 1 source reference2008–2011 (fixture)
Fixture Civic Square
Synthetic adaptation tied explicitly to the Fixture Square Renewal transformation entity.
explicit time event · 1 source reference2008–2011 (fixture)
Fixture Square Renewal
Derived from the entity chronology.
entity chronology · 1 source referenceDate unknown (fixture)
Fixture Tidal Garden
Synthetic unknown-date event proving unknown is a valid evidence state, not an error.
explicit time event · 1 source reference02 / Lifecycle
Current state is contextual metadata, not a hidden historical assertion.
Fixture Observation Tower
Current state: Extant
3 explicit dated events. This state is not itself converted into an event.
Fixture Harbor Footbridge
Current state: Extant
1 explicit dated event. This state is not itself converted into an event.
Fixture Glass Market
Current state: Demolished
2 explicit dated events. This state is not itself converted into an event.
Fixture Sea Arcology
Current state: Unbuilt
2 explicit dated events. This state is not itself converted into an event.
03 / Lost + Unbuilt
Absence and unrealized futures belong in the same model as surviving places.
2 timeline events
1979 (fixture): Damaged · 1982 (fixture): Demolished
2 timeline events
1973 (fixture): Proposed · 1976 (fixture): Cancelled / not realized
1 timeline event
Date unknown (fixture): Restored
04 / Rules
The time model is deliberately conservative.
No precision inflation
A decade does not become a year. An approximate year does not become exact. A range remains a range.
No lifecycle inference
“Demolished” may describe the current record state, but demolition enters the timeline only when dated evidence exists.
Future seam, not future fiction
Then/Now imagery and historical geometry are reserved for later stages; APU007 stores the evidence seam without pretending those layers exist yet.
05 / Accessible ledger
The visual timeline has a complete text/table equivalent.
| Date | Event | Entity | Precision | Origin | Sources |
|---|---|---|---|---|---|
| April 1958 (fixture) | Opened | Fixture Studio Northline | Month | explicit time event | 1 |
| 1961 (fixture) | Construction started | Fixture Observation Tower | Year | explicit time event | 1 |
| 1964 (fixture) | Completed | Fixture Observation Tower | Year | entity chronology | 1 |
| c. 1972 (fixture) | Completed | Fixture Harbor Footbridge | Approximate | explicit time event | 1 |
| 1973 (fixture) | Proposed | Fixture Sea Arcology | Year | explicit time event | 1 |
| 1976 (fixture) | Cancelled / not realized | Fixture Sea Arcology | Year | explicit time event | 1 |
| 1979 (fixture) | Damaged | Fixture Glass Market | Year | explicit time event | 1 |
| 1982 (fixture) | Demolished | Fixture Glass Market | Year | entity chronology | 1 |
| 1990s (fixture) | Altered | Fixture Observation Tower | Decade | explicit time event | 1 |
| 3 May 2001 (fixture) | Designated / recognized | Fixture Harbor City | Day | explicit time event | 1 |
| 2008–2011 (fixture) | Adapted | Fixture Civic Square | Range | explicit time event | 1 |
| 2008–2011 (fixture) | Occurred | Fixture Square Renewal | Range | entity chronology | 1 |
| Date unknown (fixture) | Restored | Fixture Tidal Garden | Unknown | explicit time event | 1 |