# length (spatial)

how much space between two boundaries of a thing

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

## Emergence
**Emerges from:** [extent](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-extent.spatial), [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)

**Through:** the boundaries together define an interval of space, which becomes the length

**Novel properties:**
- measured interval
- spatial separation
- bounded extent

## Examples
- The Golden Gate Bridge spans 1.7 miles across the strait connecting San Francisco to Marin County. *(engineering)*
- Proxima Centauri is 4.24 light-years from Earth, the nearest star outside the solar system. *(astronomy)*
- The Amazon River extends 4,345 miles from its source in the Andes to its mouth in the Atlantic. *(geography)*

## Used by
- [long](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-long.size) (L5)
- [meters](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-meters.measurement) (L15)
- [miles](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-miles.measurement) (L16)
- [short](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-short.length) (L5)

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