メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.884565153167 43.0118266870473, 142.884103681222 43.0122294836804, 142.884046927303 43.0121950545218, 142.882946680169 43.011506137727, 142.883081939904 43.0113883630285, 142.883316691404 43.0111741936453, 142.883387282781 43.0111097903071, 142.884532515263 43.0118073860545, 142.884565153167 43.0118266870473)) ^^http://www.opengis.net/ont/geosparql#wktLiteral