メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.373210416139 43.0525399449918, 141.37257432525 43.0529291994123, 141.372056510106 43.0524882003362, 141.373059042459 43.0518627026217, 141.373591569489 43.0523009987281, 141.373210416139 43.0525399449918)) ^^http://www.opengis.net/ont/geosparql#wktLiteral