メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.969743318187 43.5369605653531, 144.969685191197 43.5370049143658, 144.96905625755 43.5374976294181, 144.968204479757 43.5369431133478, 144.969020892741 43.5363033695731, 144.969883675456 43.5368533278406, 144.969743318187 43.5369605653531)) ^^http://www.opengis.net/ont/geosparql#wktLiteral