メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.412912321179 43.8332938095108, 142.412745696808 43.8331864017006, 142.412935323105 43.8330513403131, 142.411490364989 43.8320169550413, 142.413741339017 43.8303809386678, 142.415338721157 43.8315389652417, 142.412912321179 43.8332938095108)) ^^http://www.opengis.net/ont/geosparql#wktLiteral