# level (spatial)

a flat surface that is just between its boundaries

- Computed level: L16 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: common  ·  Arena: level

## Emergence
**Emerges from:** [flat](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-flat.commonsurfacegeometry), [boundary](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-boundary.limit), [space](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-space.extent), [just](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-just.exact), [surface](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-surface.exterior)

**Through:** When a flat surface is bounded and coincides exactly with the space it occupies, the surface and boundaries together form a level.

**Novel properties:**
- exact fit between surface and space
- bounded flatness
- spatial coincidence

## Examples
- The surface of Lake Mead remained at 1081 feet elevation for 72 days in 2000, bounded by the Hoover Dam's spillway gates. *(geography)*
- The International Space Station's solar array platform maintains a 45-degree tilt angle relative to Earth's terminator during sun-tracking mode. *(engineering)*
- The floor of the Salar de Uyuni reflects the sky so uniformly because its salt crust forms a level surface over 10,000 square kilometers. *(geology)*

## Used by
- [emergent](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-emergent.window) (L17)
- [frozen](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-frozen.state) (L18)
- [impossibility](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-impossibility.unreachable) (L17)
- [substrate](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-substrate.level) (L17)

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-level.spatial*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-level.spatial.json*  
*Every definition provably resolves to space, time, energy and pattern.*