メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.458891455928 43.0371345093418, 144.459583750359 43.0369560054072, 144.460030119772 43.03800727632, 144.45933365111 43.0381766510432, 144.45829559555 43.0384291349198, 144.458169862408 43.038147442229, 144.458008416057 43.0377682630388, 144.45784081287 43.0373937025027, 144.458891455928 43.0371345093418)) ^^http://www.opengis.net/ont/geosparql#wktLiteral