メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.474338357057 43.463951067136, 142.474633488328 43.4643213564896, 142.474975563665 43.4646829732911, 142.475052222857 43.4647669690155, 142.472168853199 43.4661233252753, 142.470084845556 43.4670829735098, 142.468988203389 43.4676256338005, 142.468081142538 43.4680638404085, 142.468323504471 43.4668481372613, 142.468361699867 43.4665827924019, 142.468541898874 43.4665909943724, 142.468741600788 43.4655440845581, 142.468918319865 43.4653715533805, 142.469106286513 43.4642859850514, 142.469181141931 43.4642934388901, 142.469630339175 43.4643381868799, 142.469436568813 43.4654382547837, 142.470943941541 43.4647749636247, 142.472277098794 43.4641419426229, 142.473833115558 43.4634114890886, 142.474129891424 43.4637061756542, 142.474338357057 43.463951067136)) ^^http://www.opengis.net/ont/geosparql#wktLiteral