メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.060279669389 34.8659338012142, 137.059551729226 34.8662979151532, 137.059052577259 34.8655748061399, 137.059774993386 34.8652261160417, 137.060279669389 34.8659338012142)) ^^http://www.opengis.net/ont/geosparql#wktLiteral