メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.4250000 33.4625000, 130.4312500 33.4625000, 130.4312500 33.4666667, 130.4250000 33.4666667, 130.4250000 33.4625000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral