メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.808081983342 35.3172459229802, 136.808576455105 35.3171154143129, 136.808736158257 35.3175968151457, 136.807897549176 35.317812220546, 136.8068904465 35.3180574726183, 136.806703479305 35.3175847210541, 136.806531861583 35.3171146912159, 136.807529425369 35.3168575123508, 136.807525407839 35.3168429927798, 136.807884386486 35.3167615222871, 136.808081983342 35.3172459229802)) ^^http://www.opengis.net/ont/geosparql#wktLiteral