メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.859916179477 43.3304932596633, 141.86013390686 43.3312131035116, 141.859240386389 43.3313479776051, 141.859021971366 43.330616947295, 141.858897037459 43.330165718973, 141.859777190618 43.3300244019301, 141.859916179477 43.3304932596633)) ^^http://www.opengis.net/ont/geosparql#wktLiteral