メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.106537104409 31.4806415751272, 131.10651332559 31.4801920138482, 131.106165893899 31.480199213908, 131.106148864549 31.4796891850839, 131.106129262373 31.4795145832247, 131.106032115234 31.4795048003727, 131.106056003118 31.4793152230963, 131.10714088621 31.4793199389215, 131.107216142144 31.4795904694219, 131.107593608063 31.4800376135635, 131.107347974802 31.4802910843581, 131.107129850391 31.4804784321321, 131.106926162753 31.4805617569388, 131.106703034049 31.4806159251433, 131.106537104409 31.4806415751272)) ^^http://www.opengis.net/ont/geosparql#wktLiteral