メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.698081826812 44.3689559598999, 141.697363877836 44.3685831486724, 141.696945814862 44.3683691206169, 141.697363934103 44.3680093109408, 141.699157583723 44.3668444857354, 141.699359807026 44.366712884092, 141.70034313243 44.3675001693179, 141.700436876504 44.3675749102832, 141.699256674574 44.368330364045, 141.69843678845 44.3686045253039, 141.698081826812 44.3689559598999)) ^^http://www.opengis.net/ont/geosparql#wktLiteral