メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.747984868921 43.1601727562022, 141.747794314129 43.1603786901844, 141.747361539537 43.1608405442142, 141.747266566798 43.1608122052408, 141.747105028403 43.1607650046281, 141.746864816632 43.1606407965028, 141.746515625647 43.1604568888128, 141.746469664384 43.1600167675369, 141.746662612196 43.1600582698123, 141.747570826219 43.1591206863388, 141.748172903174 43.159281790592, 141.748689309724 43.1594112186711, 141.747984868921 43.1601727562022)) ^^http://www.opengis.net/ont/geosparql#wktLiteral