メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.190510777753 34.6873579373293, 135.189803896201 34.6873358720878, 135.189819878864 34.6870337644527, 135.190966158444 34.6870685083713, 135.190985693156 34.687374873092, 135.190510777753 34.6873579373293)) ^^http://www.opengis.net/ont/geosparql#wktLiteral