メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.9812500 35.1958334, 132.9875000 35.1958334, 132.9875000 35.2000000, 132.9812500 35.2000000, 132.9812500 35.1958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral