メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.262594045296 43.1215958413415, 141.262987748061 43.1219322409693, 141.261597666444 43.1228050040771, 141.260944894591 43.1232093921401, 141.260297528818 43.1230101179404, 141.259795694575 43.1228660392517, 141.25929949065 43.1227122317776, 141.259152813724 43.122674815048, 141.261482891826 43.1211685095272, 141.261835114329 43.1209381935502, 141.262210741609 43.1212757061592, 141.262594045296 43.1215958413415)) ^^http://www.opengis.net/ont/geosparql#wktLiteral