メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.348616280494 43.0806890313773, 141.348556193438 43.0809655837959, 141.348475106061 43.0812607471815, 141.348326324153 43.0818341618513, 141.347410999163 43.081716101449, 141.346763578096 43.0816294071833, 141.346915585685 43.0810462441982, 141.346972821955 43.0807553232472, 141.347043985067 43.0804764688639, 141.348616280494 43.0806890313773)) ^^http://www.opengis.net/ont/geosparql#wktLiteral