# Groma surveying

> principal Roman surveying instrument

**Wikidata**: [Q643950](https://www.wikidata.org/wiki/Q643950)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Groma_(surveying))  
**Source**: https://4ort.xyz/entity/groma-surveying


## References

1. Freebase Data Dumps. 2013