メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.744521815679 43.188035284855, 141.744064691332 43.1884852699272, 141.743644514573 43.1889178336382, 141.743082556763 43.1894963340171, 141.741546216232 43.1887079701597, 141.742092568383 43.1881403094848, 141.742525316211 43.1876991560196, 141.74296121486 43.1872423324418, 141.744521815679 43.188035284855)) ^^http://www.opengis.net/ont/geosparql#wktLiteral