メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.363471279305 43.0945485466643, 141.363295156356 43.0953140936772, 141.362749790529 43.0952467128521, 141.362248300002 43.0951781231741, 141.361753357593 43.0951081057248, 141.361862597658 43.0946817179228, 141.362044777129 43.0939430104095, 141.362591202281 43.0940158899606, 141.363573055607 43.0941462928378, 141.363471279305 43.0945485466643)) ^^http://www.opengis.net/ont/geosparql#wktLiteral