メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.92022180187 43.4955192517049, 141.91569416188 43.496207842663, 141.915441629098 43.4953538664323, 141.91791559882 43.4949697190377, 141.919676073571 43.4946886633305, 141.919748269352 43.4946776900344, 141.920075716985 43.4951713102131, 141.92022180187 43.4955192517049)) ^^http://www.opengis.net/ont/geosparql#wktLiteral