メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.7562500 32.6958334, 130.7625000 32.6958334, 130.7625000 32.7000000, 130.7562500 32.7000000, 130.7562500 32.6958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral