メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.524950270172 43.858267561058, 141.52361931822 43.8583319043823, 141.522809376391 43.8580318784799, 141.52261941981 43.8579605608645, 141.52270073607 43.8578427818888, 141.522846253947 43.8576319648164, 141.523069186283 43.8573163445054, 141.52312015967 43.8572441773848, 141.523744957346 43.8574520840859, 141.524765374476 43.8573487285723, 141.524898491803 43.857992870501, 141.524929716733 43.8581028992612, 141.524950270172 43.858267561058)) ^^http://www.opengis.net/ont/geosparql#wktLiteral