メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.400849315417 44.1660892003445, 142.39955531412 44.1658966068476, 142.399124836789 44.1658288542635, 142.399604372559 44.1642243107176, 142.401338914989 44.1644832812557, 142.400849315417 44.1660892003445)) ^^http://www.opengis.net/ont/geosparql#wktLiteral