メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.262379406747 44.0228829405751, 144.261642086157 44.022582617572, 144.261046404211 44.022453441303, 144.261325181247 44.0220294824585, 144.261844484446 44.0221305293525, 144.262346474943 44.0222670464763, 144.262732803957 44.0223721255174, 144.262379406747 44.0228829405751)) ^^http://www.opengis.net/ont/geosparql#wktLiteral