メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.173553630849 43.9144699076503, 144.173859880247 43.9149901892642, 144.173221166895 43.9152009454744, 144.173173574606 43.9151790847492, 144.172395746175 43.9147974988803, 144.171642849067 43.9144589159387, 144.171779927325 43.9143357439727, 144.171815745272 43.9143242765775, 144.173248755994 43.9138652789543, 144.173553630849 43.9144699076503)) ^^http://www.opengis.net/ont/geosparql#wktLiteral