# chart datum

> level of water that charted depths displayed on a nautical chart are measured from

**Wikidata**: [Q956736](https://www.wikidata.org/wiki/Q956736)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Chart_datum)  
**Source**: https://4ort.xyz/entity/chart-datum


## References

1. Freebase Data Dumps. 2013