メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.386390817481 44.1702246413919, 142.384835169999 44.1699809110437, 142.384655348216 44.1705655073812, 142.3845711011 44.1708393665859, 142.382313829423 44.1704731915495, 142.382333409488 44.1704164403591, 142.382057401812 44.1703671142419, 142.381949118819 44.1704097805403, 142.380358498423 44.1701430723019, 142.380431626833 44.1699028403252, 142.380751324036 44.1688785581493, 142.381850569274 44.1690550462169, 142.381854207074 44.1690434223345, 142.38267298443 44.169187086994, 142.386510466496 44.1698030921132, 142.386390817481 44.1702246413919)) ^^http://www.opengis.net/ont/geosparql#wktLiteral