メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.885038016036 43.0148009017269, 142.883939491317 43.0141171177049, 142.883976011093 43.014085126542, 142.884943361315 43.0132524213195, 142.886045608135 43.0139349795844, 142.88507022239 43.0147734351746, 142.885038016036 43.0148009017269)) ^^http://www.opengis.net/ont/geosparql#wktLiteral