# levelling

> in topography, measurement of height difference between points

**Wikidata**: [Q961466](https://www.wikidata.org/wiki/Q961466)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Levelling)  
**Source**: https://4ort.xyz/entity/levelling


## References

1. [Source](https://github.com/JohnMarkOckerbloom/ftl/blob/master/data/wikimap)
2. Nuovo soggettario
3. Freebase Data Dumps. 2013
4. National Library of Israel Names and Subjects Authority File
5. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)