メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.2562500 34.3416667, 131.2625000 34.3416667, 131.2625000 34.3458334, 131.2562500 34.3458334, 131.2562500 34.3416667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral