メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.359543034974 43.7867427523979, 142.358932527374 43.7871799989471, 142.358334577303 43.7876170246894, 142.35832276196 43.7876256682354, 142.357708149775 43.7871812873755, 142.356692633492 43.7864474828373, 142.357306047988 43.7859910717713, 142.357920992306 43.7855617811681, 142.359543034974 43.7867427523979)) ^^http://www.opengis.net/ont/geosparql#wktLiteral