メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.979224104013 43.5508756790795, 144.978841538616 43.5511476341239, 144.978432879075 43.5514498155398, 144.977658458857 43.5508676493363, 144.977497997375 43.5507441343557, 144.977363680617 43.5506472078459, 144.978126876209 43.550064747392, 144.978742704215 43.5505007443739, 144.979224104013 43.5508756790795)) ^^http://www.opengis.net/ont/geosparql#wktLiteral