メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.045118849299 42.9169937867933, 143.045063018724 42.9170536037743, 143.045018896906 42.9170901311326, 143.044411240274 42.9170624098898, 143.044461631415 42.9166537830301, 143.044595741821 42.915566646318, 143.045325712878 42.9156160249705, 143.045118849299 42.9169937867933)) ^^http://www.opengis.net/ont/geosparql#wktLiteral