メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.466828638302 43.461536141166, 142.467700500083 43.4615957464575, 142.467535887868 43.4627162207306, 142.467384064772 43.4638378305933, 142.466520654525 43.4637679741763, 142.465637769972 43.4637121429213, 142.465786301335 43.4625997895482, 142.465946723231 43.4614791505751, 142.466828638302 43.461536141166)) ^^http://www.opengis.net/ont/geosparql#wktLiteral