Symbol 0985 from ISO 7000 - Title/Meaning: Origin; datum Function/description: Indicates a reference to an origin or datum.
Additional information: 
Symbol may be varied depending on the particular datum to which it relates.
Own work using: iso.org/obp/graphics/grs/fed6425f-db3f-468d-9eb8-81e21684fa93 200.png
Vectorization:  Mrmw