メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.412570556111 43.8038761256456, 142.412566848401 43.8038791867598, 142.407855441087 43.8009432104054, 142.409444927284 43.7996345465509, 142.410586529902 43.8003526669933, 142.411549345029 43.8009352164294, 142.413113109936 43.8018836323993, 142.413701254892 43.8021731013194, 142.414322572022 43.8024296607661, 142.412570556111 43.8038761256456)) ^^http://www.opengis.net/ont/geosparql#wktLiteral