メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.769092484195 43.2041472437536, 141.768729930746 43.2045351292264, 141.768425519369 43.2048577802046, 141.768410363886 43.2048716695699, 141.767896709341 43.2046219677178, 141.767912154143 43.2046080688356, 141.767478992168 43.2043973658369, 141.767818388086 43.2040701503376, 141.768178570019 43.2036908411467, 141.769092484195 43.2041472437536)) ^^http://www.opengis.net/ont/geosparql#wktLiteral