メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.605880891911 35.7907974583559, 140.605450772111 35.7905684107149, 140.605342838973 35.7903562794215, 140.605903272962 35.7895787447325, 140.606539660415 35.7898850157494, 140.605880891911 35.7907974583559)) ^^http://www.opengis.net/ont/geosparql#wktLiteral