メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.262052885124 44.0233587109698, 144.26116571188 44.0232724274866, 144.261142063052 44.0231897958349, 144.2606656012 44.0230245381711, 144.261046404211 44.022453441303, 144.261642086157 44.022582617572, 144.262379406747 44.0228829405751, 144.262052885124 44.0233587109698)) ^^http://www.opengis.net/ont/geosparql#wktLiteral