メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.327303924311 43.7602402050679, 142.327748994077 43.7603716148152, 142.327727550424 43.7604072467443, 142.327083059359 43.7614779563803, 142.326656722015 43.7613506625485, 142.326048097378 43.7611539752719, 142.326588441553 43.7602099384516, 142.32668008213 43.7600631518404, 142.327303924311 43.7602402050679)) ^^http://www.opengis.net/ont/geosparql#wktLiteral