メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.962228644649 43.5445816377763, 144.961890765158 43.5443466733058, 144.962519987471 43.5438575412967, 144.962601480629 43.5439113689232, 144.962800929753 43.5440430867401, 144.962901747154 43.544109604522, 144.962342791083 43.5445531558563, 144.962295302631 43.5445289686662, 144.962228644649 43.5445816377763)) ^^http://www.opengis.net/ont/geosparql#wktLiteral