メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.384507937317 43.7685677710385, 142.385831486762 43.7686188948997, 142.385803431626 43.7691310815545, 142.385798354787 43.769149986529, 142.383802968627 43.7690738338239, 142.383714442093 43.7689045131615, 142.383614886333 43.7683103212562, 142.383563785914 43.7680551471343, 142.384877371658 43.7676808989147, 142.385170624839 43.7681855195876, 142.384507937317 43.7685677710385)) ^^http://www.opengis.net/ont/geosparql#wktLiteral