メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.051416089427 42.9044222105098, 143.050782527262 42.9043755773766, 143.050315581423 42.903822996702, 143.049899253074 42.9033297030888, 143.050342495636 42.9033673311034, 143.050847609762 42.9034101526001, 143.050949312294 42.9034180924983, 143.051416089427 42.9044222105098)) ^^http://www.opengis.net/ont/geosparql#wktLiteral