メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.987454341429 34.9034338286151, 136.987622649857 34.9041766756738, 136.98596631421 34.9041813405017, 136.985858814444 34.9026654135205, 136.986548511494 34.9026279132655, 136.987254300605 34.9025508513202, 136.987332019874 34.9028938833307, 136.987454341429 34.9034338286151)) ^^http://www.opengis.net/ont/geosparql#wktLiteral