メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.350392262024 44.4773412010854, 142.349328937232 44.4770845433809, 142.34938020362 44.4769770943696, 142.349891972279 44.4759041859581, 142.350966382111 44.4761709900795, 142.350440849637 44.4772399768592, 142.350392262024 44.4773412010854)) ^^http://www.opengis.net/ont/geosparql#wktLiteral