メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.906574459036 43.4924611369196, 141.906909788094 43.4936591657656, 141.906144893027 43.4937698179287, 141.906119299016 43.4937735038793, 141.905792635448 43.4925913574302, 141.905718981934 43.4923247758458, 141.906489958395 43.4921989879704, 141.906512946133 43.4921947314658, 141.906574459036 43.4924611369196)) ^^http://www.opengis.net/ont/geosparql#wktLiteral