メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.301106555542 43.0826078940149, 141.300790754815 43.0825543571747, 141.300481579333 43.0825068518327, 141.300103796292 43.0824720677824, 141.299545930241 43.0824304432316, 141.299229151609 43.0824093150456, 141.29896806923 43.0823913216058, 141.299097139908 43.0813912600501, 141.299114730864 43.0812402697108, 141.299041236293 43.0811596949689, 141.29907177705 43.0808166017633, 141.299098518676 43.0805950064383, 141.299495761897 43.0811202891276, 141.299987437193 43.0816571145693, 141.300732897735 43.0822810007398, 141.30078231641 43.0823241707093, 141.301106555542 43.0826078940149)) ^^http://www.opengis.net/ont/geosparql#wktLiteral