メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.399838313269 44.167927053724, 142.398856359145 44.1677694484041, 142.3979565509 44.167625211895, 142.398296443044 44.1665480245425, 142.399232488027 44.1667002609511, 142.399298562409 44.1667104951287, 142.400159682705 44.1668625046908, 142.399838313269 44.167927053724)) ^^http://www.opengis.net/ont/geosparql#wktLiteral