メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.757819087954 43.1786313155728, 141.758215787955 43.1788339509251, 141.75860868714 43.179019549203, 141.758658696072 43.1790509192708, 141.759093872047 43.1792734805607, 141.75797091937 43.1804662044394, 141.757131341176 43.1813636364904, 141.75667037583 43.1811202116191, 141.756638592778 43.1811048835696, 141.756390698077 43.1809856620891, 141.756243527853 43.1809129402144, 141.755949264664 43.180763838652, 141.755856043784 43.1807165973331, 141.755458653735 43.1805274541406, 141.756312975179 43.1796265100304, 141.757407038247 43.1784257985492, 141.757819087954 43.1786313155728)) ^^http://www.opengis.net/ont/geosparql#wktLiteral