メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.7125000 33.5958334, 130.7187500 33.5958334, 130.7187500 33.6000000, 130.7125000 33.6000000, 130.7125000 33.5958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral