メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.356276096589 43.7732601509236, 142.356279710335 43.7732665652536, 142.356304856414 43.7733080651029, 142.356419818255 43.7734978045663, 142.354947942605 43.7739213977901, 142.354819211157 43.7736861718172, 142.355585524031 43.7734645400004, 142.356180835316 43.7732814754843, 142.356276096589 43.7732601509236)) ^^http://www.opengis.net/ont/geosparql#wktLiteral