メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.978277853878 43.5562625907298, 144.97756237376 43.556062040824, 144.977908418503 43.5553190573712, 144.979812320673 43.5554195222413, 144.980663755089 43.5563003026545, 144.978494755761 43.5556874455086, 144.978277853878 43.5562625907298)) ^^http://www.opengis.net/ont/geosparql#wktLiteral