メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.2000000 32.7916667, 130.2062500 32.7916667, 130.2062500 32.7958334, 130.2000000 32.7958334, 130.2000000 32.7916667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral