メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.153653983109 35.0723301926368, 137.153564222712 35.0728009790917, 137.153537169035 35.0730935267667, 137.153532849892 35.0733681882859, 137.152159152225 35.0733211500715, 137.152003345181 35.0722725476548, 137.153653983109 35.0723301926368)) ^^http://www.opengis.net/ont/geosparql#wktLiteral