メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.667659823065 34.5313968366475, 136.667740252359 34.5320646330889, 136.66765282077 34.532210197251, 136.666846180509 34.5320300836552, 136.666922911221 34.5319030322526, 136.666812782482 34.5316993878074, 136.666630023169 34.5312663992181, 136.667623606316 34.5309212124243, 136.667659823065 34.5313968366475)) ^^http://www.opengis.net/ont/geosparql#wktLiteral