メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.334574743979 43.0418369749574, 141.334518861916 43.0422678612795, 141.334492165731 43.0424962195128, 141.332802369224 43.042368681787, 141.332874648162 43.0417390354168, 141.332932758535 43.0412558423526, 141.334638847717 43.0413432089826, 141.334635622088 43.0413666735825, 141.334574743979 43.0418369749574)) ^^http://www.opengis.net/ont/geosparql#wktLiteral