メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.35693709656 43.7649620764047, 142.357004693021 43.7650394062341, 142.35736438519 43.7654614928858, 142.355782791939 43.7659173476522, 142.355474393713 43.7653737222847, 142.354473685398 43.7635540793934, 142.354658391294 43.7634383541834, 142.354710356828 43.7634057967801, 142.356826068221 43.7648350648366, 142.35689079694 43.764909112063, 142.35693709656 43.7649620764047)) ^^http://www.opengis.net/ont/geosparql#wktLiteral