メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.358441881644 43.059816391881, 141.357432877972 43.0596777095128, 141.357587544729 43.0590984138619, 141.357734069479 43.05853797346, 141.358743188175 43.058667441027, 141.358678543181 43.0588794742817, 141.358638887 43.0590547085102, 141.358441881644 43.059816391881)) ^^http://www.opengis.net/ont/geosparql#wktLiteral