メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((128.77271852128 32.6120979789155, 128.772107093932 32.6127886030334, 128.772037708647 32.6128145173567, 128.771868465467 32.6123214500153, 128.77271852128 32.6120979789155)) ^^http://www.opengis.net/ont/geosparql#wktLiteral