メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.987964098079 34.9079877143592, 136.986134235115 34.9085426027148, 136.986017510849 34.9077728559661, 136.985909530612 34.9070371385306, 136.986036321141 34.9070585962081, 136.988772693284 34.9076561929923, 136.988786078123 34.907732275284, 136.987964098079 34.9079877143592)) ^^http://www.opengis.net/ont/geosparql#wktLiteral