メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.047353614722 42.9069724842969, 143.048087181647 42.9070154846758, 143.047902583618 42.908246263434, 143.047170513253 42.9081941087152, 143.046507093416 42.9081533573548, 143.046412203186 42.908147545868, 143.046564417497 42.9069257859384, 143.047353614722 42.9069724842969)) ^^http://www.opengis.net/ont/geosparql#wktLiteral