メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.431306918075 43.808836144363, 142.431808294256 43.8091559048364, 142.432330272527 43.8094753304333, 142.431699907156 43.8099836706709, 142.431151540692 43.8104523939417, 142.430635882696 43.8101324419005, 142.430122906116 43.8098178458603, 142.430100761236 43.8098043440799, 142.429584875912 43.8094894502214, 142.42900996904 43.809130204515, 142.430222870234 43.8081591224525, 142.430788392682 43.8085106424562, 142.431306918075 43.808836144363)) ^^http://www.opengis.net/ont/geosparql#wktLiteral