メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.326820646002 43.064728071433, 141.326677351769 43.0652957355971, 141.326540150559 43.0658661916152, 141.324984768297 43.065662110218, 141.325125361546 43.0650775478959, 141.325272273692 43.0645126582838, 141.326309833342 43.0646665566703, 141.326820646002 43.064728071433)) ^^http://www.opengis.net/ont/geosparql#wktLiteral