メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.373144442226 43.8187701471069, 142.372386857008 43.8192991325907, 142.372134296179 43.8194578498832, 142.371452902707 43.819967603225, 142.370696259411 43.8205336549496, 142.370377925608 43.8202959645439, 142.369700991335 43.8198177926353, 142.370971493168 43.8189140736723, 142.371366424659 43.8186147605331, 142.372155762008 43.8180563875564, 142.373144442226 43.8187701471069)) ^^http://www.opengis.net/ont/geosparql#wktLiteral