メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.350697817075 44.4806839900876, 142.349921307121 44.4804921585237, 142.349956049049 44.4804202680857, 142.350003147374 44.4803228444572, 142.35022539852 44.4798630833236, 142.350928796564 44.4800482274876, 142.351015913172 44.4800711074544, 142.350697817075 44.4806839900876)) ^^http://www.opengis.net/ont/geosparql#wktLiteral