メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.400370244975 44.1731322550861, 142.399367086135 44.172965385187, 142.399688638658 44.1719095490836, 142.400701876431 44.1720752963251, 142.400541241814 44.1725876040901, 142.400370244975 44.1731322550861)) ^^http://www.opengis.net/ont/geosparql#wktLiteral