メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.743447436513 35.4119322679114, 136.743245057071 35.4123075006259, 136.741982416849 35.4118875193196, 136.742166495539 35.4115253578265, 136.743447436513 35.4119322679114)) ^^http://www.opengis.net/ont/geosparql#wktLiteral