メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.263442504216 44.028082506034, 144.262929441021 44.028368801187, 144.262095515025 44.0280842474269, 144.262432540525 44.0275608497282, 144.263629764592 44.0279773626248, 144.263442504216 44.028082506034)) ^^http://www.opengis.net/ont/geosparql#wktLiteral