メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.9750000 35.3250000, 132.9812500 35.3250000, 132.9812500 35.3291667, 132.9750000 35.3291667, 132.9750000 35.3250000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral