メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.730038591307 35.1721773080854, 136.730609856001 35.1720221895559, 136.730569638365 35.1730497645072, 136.730051630033 35.173068036659, 136.729607041616 35.1730938244141, 136.729576673406 35.1730950532566, 136.729538444784 35.1726013353367, 136.729209396483 35.1726176102585, 136.729198367143 35.1724107447284, 136.729197353893 35.1722716599554, 136.730034997619 35.1720152566402, 136.730038591307 35.1721773080854)) ^^http://www.opengis.net/ont/geosparql#wktLiteral