メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.35583155025 43.7690852744448, 142.356146361724 43.7696147575027, 142.355926369942 43.7696870262137, 142.354619104407 43.7700586811262, 142.354323684445 43.7695265379841, 142.354315460767 43.7695117253268, 142.354012453849 43.7689876044916, 142.355552575999 43.7685430101711, 142.355851929979 43.7690795414287, 142.35583155025 43.7690852744448)) ^^http://www.opengis.net/ont/geosparql#wktLiteral