メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.808605840373 35.3197942294475, 136.80879012307 35.320275635725, 136.809028802145 35.320908265841, 136.808059782611 35.3211554038017, 136.807087605225 35.3213911854275, 136.806844663653 35.3207637508577, 136.806488833442 35.3197975173716, 136.807464221834 35.3195504135452, 136.808423704231 35.3193041003504, 136.808605840373 35.3197942294475)) ^^http://www.opengis.net/ont/geosparql#wktLiteral