メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.394512284173 44.1659364831867, 142.394166293781 44.1658810850271, 142.392790889298 44.1656649238861, 142.392459918913 44.1656136151977, 142.392285031352 44.165586496933, 142.392653551148 44.164302401615, 142.39443051772 44.1646060268496, 142.394313624564 44.1649304775239, 142.394790171701 44.1650070854732, 142.394512284173 44.1659364831867)) ^^http://www.opengis.net/ont/geosparql#wktLiteral