メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.915388879481 43.4828028215531, 141.915496688753 43.4831633790707, 141.915644254005 43.4836567559813, 141.91429370306 43.4838590975742, 141.91296711544 43.4840578024165, 141.912176887006 43.4841761474692, 141.911895727181 43.4832016314529, 141.911819032819 43.4829370529865, 141.912621311672 43.4828195880447, 141.913936538639 43.4826096706543, 141.91526563917 43.4823907762895, 141.915388879481 43.4828028215531)) ^^http://www.opengis.net/ont/geosparql#wktLiteral