メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.356644428387 43.0554192721416, 141.356467238786 43.0561033226226, 141.356383651956 43.0564835058313, 141.35636817879 43.056558357227, 141.355561908065 43.0564512019217, 141.355559229705 43.056450759675, 141.355353709886 43.0564219009486, 141.35475726055 43.0563381473131, 141.354866678394 43.0558839694575, 141.355019152889 43.0552057759434, 141.356644428387 43.0554192721416)) ^^http://www.opengis.net/ont/geosparql#wktLiteral