メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.4875000 34.4208334, 132.4937500 34.4208334, 132.4937500 34.4250000, 132.4875000 34.4250000, 132.4875000 34.4208334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral