メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.340469041556 43.7710038548977, 142.340474936255 43.7710151556062, 142.340786784682 43.7715761748313, 142.33926066887 43.7720074839896, 142.338934251902 43.7714475800481, 142.33870822313 43.7711129740936, 142.338627990188 43.7709733258921, 142.338412348235 43.7705856555235, 142.339201217213 43.7703685639118, 142.339993676643 43.7701609233736, 142.340165288703 43.7704516709079, 142.340279857654 43.7706417284174, 142.340469041556 43.7710038548977)) ^^http://www.opengis.net/ont/geosparql#wktLiteral