メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.289061673442 43.1550562458939, 141.289669372008 43.1555083551323, 141.290276225116 43.1559598222294, 141.290919929991 43.15643867059, 141.289266650563 43.157613347333, 141.288636158111 43.1571495801746, 141.288023147414 43.1566987566517, 141.287420307742 43.1562553999056, 141.286832670863 43.1558231388594, 141.287994418456 43.154985035698, 141.288487595634 43.1546291707866, 141.288789288602 43.1548536112847, 141.289061673442 43.1550562458939)) ^^http://www.opengis.net/ont/geosparql#wktLiteral