メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.379134485644 34.8181851532176, 137.378723413938 34.8185826775162, 137.378309797568 34.8183777345437, 137.378628242101 34.8179268445611, 137.378751279987 34.817949169143, 137.378860710269 34.8179940552989, 137.378997555159 34.8180727008418, 137.379134485644 34.8181851532176)) ^^http://www.opengis.net/ont/geosparql#wktLiteral