メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.6500000 32.8833333, 130.6562500 32.8833333, 130.6562500 32.8875000, 130.6500000 32.8875000, 130.6500000 32.8833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral