メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.176370391512 43.913648332494, 144.176620932129 43.9140874701738, 144.175283979425 43.9145202511829, 144.174979476359 43.9140664809441, 144.174604109842 43.913442037989, 144.176063414825 43.9130094769898, 144.176443800902 43.91362626589, 144.176370391512 43.913648332494)) ^^http://www.opengis.net/ont/geosparql#wktLiteral