メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.557110521235 42.9025413429829, 141.557472018041 42.9027501644002, 141.557958452303 42.903469499581, 141.559660749903 42.905987645722, 141.558621956582 42.9059580975266, 141.556070499629 42.9057238622088, 141.553464501801 42.9059387252203, 141.554391500353 42.9051158576192, 141.557110521235 42.9025413429829)) ^^http://www.opengis.net/ont/geosparql#wktLiteral