メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.0562500 34.8166667, 134.0625000 34.8166667, 134.0625000 34.8208334, 134.0562500 34.8208334, 134.0562500 34.8166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral