メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.821404978857 35.3941698149147, 136.821127210814 35.3950498456677, 136.81888645408 35.3945573442671, 136.819079287997 35.3939658017711, 136.819397562135 35.3929597002076, 136.821578217356 35.3934296965662, 136.821654857554 35.3934462515341, 136.821494958283 35.3938916988989, 136.821404978857 35.3941698149147)) ^^http://www.opengis.net/ont/geosparql#wktLiteral