メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.914649124473 43.5226543713368, 141.914640775631 43.5226264282224, 141.914325401139 43.5215011729695, 141.91585171182 43.521263358585, 141.916225980669 43.5225431419923, 141.916012650808 43.5225683660151, 141.915870547653 43.5225627827077, 141.915785459457 43.5225315214896, 141.915757194773 43.5225003906136, 141.914649124473 43.5226543713368)) ^^http://www.opengis.net/ont/geosparql#wktLiteral