メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.6687500 32.6375000, 130.6750000 32.6375000, 130.6750000 32.6416667, 130.6687500 32.6416667, 130.6687500 32.6375000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral