メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.7125000 32.8875000, 132.7187500 32.8875000, 132.7187500 32.8916667, 132.7125000 32.8916667, 132.7125000 32.8875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral