メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.292460400635 42.2971376242897, 143.292640579125 42.2984337149232, 143.291576884522 42.2977800907083, 143.291352645731 42.2981724991698, 143.2905084911 42.2985314233763, 143.289199311299 42.296406988607, 143.291620703197 42.2958342924674, 143.292219249836 42.2969407568693, 143.292460400635 42.2971376242897)) ^^http://www.opengis.net/ont/geosparql#wktLiteral