メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.265213128087 44.0259908239776, 144.264924796656 44.0264315740035, 144.264433824622 44.0262642399568, 144.264499249949 44.0261615234387, 144.264747386417 44.0257717528187, 144.264780626276 44.0257264677709, 144.265262457076 44.0258993433732, 144.265213128087 44.0259908239776)) ^^http://www.opengis.net/ont/geosparql#wktLiteral