# mid (spatial)

the part of a space that is equally distant from the boundaries

- Computed level: L4 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: everyday  ·  Arena: middle

## Emergence
**Emerges from:** [center](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-center.location), [boundary](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-boundary.limit), [part](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-part.relation), [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)

**Through:** the center of a space together with its boundaries determines the region that lies equally between them

**Novel properties:**
- equidistant region
- interior continuity
- balanced position

## Examples
- The International Space Station orbits Earth at an altitude where gravitational pull from both bodies balances exactly at its center of mass. *(physics)*
- The Forbidden City in Beijing was constructed with its main halls aligned precisely at the midpoint between the northern and southern walls. *(architecture)*
- The GPS satellite network calculates position fixes by measuring signal travel time to the midpoint between orbital extremes. *(computing)*

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