メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.327926140554 43.7591627273651, 142.328360935342 43.7592879365794, 142.327748994077 43.7603716148152, 142.327303924311 43.7602402050679, 142.32668008213 43.7600631518404, 142.326845431276 43.7597790137239, 142.327296689714 43.7589647777492, 142.327311348448 43.7589394873494, 142.327452685296 43.7589872813275, 142.327926140554 43.7591627273651)) ^^http://www.opengis.net/ont/geosparql#wktLiteral