Geospatial query answering in Stardog

geo.sparql

prefix geof: <http://www.opengis.net/def/function/geosparql/>
prefix geo: <http://www.opengis.net/ont/geosparql#>

//get locations within 2km of Complexible HQ

select ?name where {
  ?loc rdfs:label ?name .
  ?loc geo:hasGeometry ?feature .
  ?hq geo:hasGeometry ?hqGeo ; rdfs:label "Complexible Headquarters" .
  ?feature geof:nearby (?hqGeo 2 <http://www.qudt.org/qudt/owl/1.0.0/unit/Instances.html#Kilometer>).
}

// results: `Complexible Headquarters`, `White House`, and `Smithsonian Museum of Natural History`