メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.395781817915 44.1648398308707, 142.39443051772 44.1646060268496, 142.394758644149 44.1634277318242, 142.396158268767 44.1636703845638, 142.395781817915 44.1648398308707)) ^^http://www.opengis.net/ont/geosparql#wktLiteral