メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.382456178885 42.9928993139187, 144.382152685836 42.9938352052575, 144.381466226522 42.9937095337319, 144.381490763347 42.9936378334606, 144.38140660659 42.9936255488809, 144.380635808237 42.993487730675, 144.380924942583 42.9926068963852, 144.381751141201 42.9922806392214, 144.381826903974 42.9922497580165, 144.382777163249 42.9918656197736, 144.382456178885 42.9928993139187)) ^^http://www.opengis.net/ont/geosparql#wktLiteral