メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.2562500 34.9833333, 134.2625000 34.9833333, 134.2625000 34.9875000, 134.2562500 34.9875000, 134.2562500 34.9833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral