メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.9812500 32.2958334, 130.9875000 32.2958334, 130.9875000 32.3000000, 130.9812500 32.3000000, 130.9812500 32.2958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral