メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.9875000 33.7000000, 135.9937500 33.7000000, 135.9937500 33.7041667, 135.9875000 33.7041667, 135.9875000 33.7000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral