メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.398531323361 43.7480349427832, 142.398590830598 43.7485291914908, 142.39654642084 43.7486431370851, 142.394568446577 43.7487466150305, 142.394567510631 43.7487364016965, 142.394404754752 43.7472755006278, 142.395987487861 43.7471795227536, 142.396214343285 43.7471712009587, 142.396398024826 43.747165237539, 142.396448006872 43.7476446792461, 142.398477629286 43.7475322128446, 142.398531323361 43.7480349427832)) ^^http://www.opengis.net/ont/geosparql#wktLiteral