メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.291384615822 43.0657060056199, 141.290794133694 43.0660375810266, 141.290344641435 43.0662898095447, 141.289874031403 43.0659099526537, 141.290907762396 43.0653327118519, 141.291822169773 43.0648156485652, 141.291955776302 43.0649209246123, 141.292435152304 43.0652988072158, 141.291995809825 43.0655468363861, 141.291810742308 43.0654137009362, 141.291430069138 43.0656206557143, 141.291384615822 43.0657060056199)) ^^http://www.opengis.net/ont/geosparql#wktLiteral