メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.888095851071 43.0209992161739, 142.887588272574 43.0206844320658, 142.887380475644 43.0205555481617, 142.887364367276 43.0205456506841, 142.888284647522 43.0197486992642, 142.889040304396 43.0201858781763, 142.888095851071 43.0209992161739)) ^^http://www.opengis.net/ont/geosparql#wktLiteral