HBC-KG Ontology

The Historical County Boundaries Ontology is a lightweight ontology (OWL2QL profile of OWL2) that reuses the TSN, TSN-Change, SEM and Time ontologies:

The ontology file is available on GitHub.

Example Queries

• The following example shows how to retrieve the states in the HBC-KG.
  SELECT ?state WHERE {
     ?state a hcb-o:State .
  }
• The following example returns the three counties that have seen the most changes.
  SELECT ?county (COUNT(?version) AS ?numberOfVersions) WHERE {
     ?county tsn:hasCountyVersion ?version .
  } GROUP BY ?county
  ORDER BY DESC(?numberOfVersions)
  LIMIT 3
  

More example queries are provided here.