メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.7437500 32.7916667, 132.7500000 32.7916667, 132.7500000 32.7958334, 132.7437500 32.7958334, 132.7437500 32.7916667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral