メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.413133748273 43.7995339911219, 142.41287357977 43.7997579457506, 142.412922589298 43.7997949890235, 142.412671599442 43.7999994698265, 142.411549345029 43.8009352164294, 142.410586529902 43.8003526669933, 142.409444927284 43.7996345465509, 142.410581301948 43.7986967255523, 142.410848546079 43.7984804125173, 142.411100697951 43.7982801717894, 142.413133748273 43.7995339911219)) ^^http://www.opengis.net/ont/geosparql#wktLiteral