メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.395022393559 44.1903983837077, 142.395456547262 44.1890527404211, 142.395575832516 44.1886830067668, 142.395742280736 44.188175974023, 142.397034614612 44.18838425094, 142.39850649076 44.1886214618738, 142.399482125153 44.1887786662328, 142.398035280863 44.1898443242859, 142.395022393559 44.1903983837077)) ^^http://www.opengis.net/ont/geosparql#wktLiteral