メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.026321760575 43.1704541337366, 143.023074689495 43.1710495127412, 143.022701314374 43.1702025406684, 143.022340785049 43.1693676474863, 143.025594143021 43.1687443269242, 143.02569914927 43.1687242047167, 143.025785984408 43.1689307324334, 143.025788576019 43.1689380289956, 143.026321760575 43.1704541337366)) ^^http://www.opengis.net/ont/geosparql#wktLiteral