メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.349266499191 44.4856910583815, 142.349256359349 44.4857123018035, 142.348503773187 44.4855265906057, 142.348814038274 44.4848320908808, 142.349215860498 44.4839868282479, 142.34978033088 44.4827993498714, 142.350211957169 44.4820213821237, 142.350472015192 44.4813055093583, 142.350505837994 44.4812124208726, 142.350697817075 44.4806839900876, 142.351015913172 44.4800711074544, 142.351843599949 44.4802885862559, 142.349266499191 44.4856910583815)) ^^http://www.opengis.net/ont/geosparql#wktLiteral