メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.850644811321 43.3392425093023, 141.850181740577 43.3393226830247, 141.849879574125 43.3393678315759, 141.849587116595 43.3394165294004, 141.849397040806 43.3394442766983, 141.849139588905 43.3386046611972, 141.849334528538 43.3385768611878, 141.849636714635 43.3385317142129, 141.84994378663 43.3384794811123, 141.850381877982 43.3384062543559, 141.850644811321 43.3392425093023)) ^^http://www.opengis.net/ont/geosparql#wktLiteral