メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.003437727257 34.8942916823464, 137.003401881057 34.8943019857636, 137.002833526117 34.8933503678306, 137.004134215343 34.8928161622569, 137.005751171777 34.8933263907971, 137.003437727257 34.8942916823464)) ^^http://www.opengis.net/ont/geosparql#wktLiteral