メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.851933849743 43.3437056939842, 141.849543418047 43.3440882342467, 141.847208278012 43.3444458115529, 141.84715462105 43.3442383716773, 141.847150414516 43.3438737145796, 141.847083162269 43.3437189000985, 141.847294589067 43.3437877900724, 141.847357137714 43.343652983142, 141.847512697403 43.3434397374589, 141.84758876443 43.3433445011916, 141.849256687642 43.3430845168963, 141.851641096157 43.3426959140956, 141.851778883718 43.343171167011, 141.851933849743 43.3437056939842)) ^^http://www.opengis.net/ont/geosparql#wktLiteral