メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.917792326616 43.4874973336001, 141.916745885327 43.487685468758, 141.916610096586 43.4872155012284, 141.916855122032 43.4872317585909, 141.917100407688 43.4872710122112, 141.917395261166 43.4873419879879, 141.917645114839 43.4874245038362, 141.917792326616 43.4874973336001)) ^^http://www.opengis.net/ont/geosparql#wktLiteral