メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.371673676999 43.0814512448688, 141.372146804697 43.0815107847988, 141.372233810227 43.0815254472979, 141.372986830441 43.0816310131565, 141.372866783478 43.0821223256228, 141.372811393214 43.0823794458876, 141.372746866045 43.0826984548313, 141.372010115663 43.082594981689, 141.371977429471 43.0825926911967, 141.371526158797 43.0825273407827, 141.371498941193 43.0825251623225, 141.371095197563 43.0824710758125, 141.371253811269 43.0813977387968, 141.371673676999 43.0814512448688)) ^^http://www.opengis.net/ont/geosparql#wktLiteral