メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.904209465073 43.4659320302168, 141.904103378104 43.4659491164424, 141.903780500649 43.4660010636453, 141.903301786395 43.4660781026301, 141.902844915033 43.4645143680784, 141.902806661241 43.4643834501171, 141.903618678499 43.4642553773032, 141.906204342646 43.4638657692453, 141.906685546149 43.465549290242, 141.905224380225 43.4657699560522, 141.904209465073 43.4659320302168)) ^^http://www.opengis.net/ont/geosparql#wktLiteral