メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.326019729964 43.7624150165843, 142.326453358346 43.7625477930497, 142.325805580571 43.7636604291145, 142.325379496062 43.7635271890285, 142.324761170432 43.7633380789488, 142.325428949186 43.7622370556701, 142.326019729964 43.7624150165843)) ^^http://www.opengis.net/ont/geosparql#wktLiteral