メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.909958384829 35.069427874105, 136.909196407979 35.069474872282, 136.909229846301 35.0688265930171, 136.909232328714 35.0687786376788, 136.909946532123 35.0688544340533, 136.909957351632 35.0694226596821, 136.909958384829 35.069427874105)) ^^http://www.opengis.net/ont/geosparql#wktLiteral