https://www.w3.org/ns/activitystreams#units

https://www.w3.org/ns/activitystreams#units

[1] Activity Vocabulary () <https://w3c.github.io/activitystreams/vocabulary/#dfn-units>

Specifies the measurement units for the radius and altitude properties on a Place object. If not specified, the default is assumed to be "m" for "meters".

Range: "cm" | " feet" | " inches" | " km" | " m" | " miles" | xsd:anyURI