メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.41539294523 43.7539661868773, 142.415409730889 43.7541126066597, 142.415451742875 43.7544832475255, 142.414563203402 43.7545388584938, 142.413769410424 43.7545784537112, 142.412161818602 43.7546766589611, 142.411403783419 43.754721444185, 142.411303697274 43.7537198151463, 142.412047578884 43.7536879022259, 142.413649998542 43.7535926238709, 142.413653190975 43.7536157730828, 142.415350707822 43.7535011211769, 142.41539294523 43.7539661868773)) ^^http://www.opengis.net/ont/geosparql#wktLiteral