メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.670804910539 32.5695683644446, 131.670491569893 32.5695635813713, 131.670509742923 32.5689228656194, 131.670819253917 32.5689277053403, 131.670804910539 32.5695683644446)) ^^http://www.opengis.net/ont/geosparql#wktLiteral