メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.378835813205 43.759864348788, 142.37915180514 43.7604424423295, 142.377668679155 43.7608877003447, 142.377369886444 43.7603059280829, 142.377048310624 43.7597359749025, 142.378505173986 43.7593027968672, 142.37851160067 43.7593137242972, 142.378835813205 43.759864348788)) ^^http://www.opengis.net/ont/geosparql#wktLiteral