メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.377868626366 43.827837384556, 142.376902593698 43.8275620337951, 142.376238299592 43.8273779043771, 142.376625467689 43.8264549197498, 142.376843995976 43.8262891975025, 142.377730260664 43.8256455916456, 142.379379079652 43.8268039834788, 142.377868626366 43.827837384556)) ^^http://www.opengis.net/ont/geosparql#wktLiteral