メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.991980291656 34.8910582924668, 136.991388555112 34.8912761884317, 136.990686310428 34.8915577293626, 136.989515233612 34.8916759604522, 136.989490492082 34.8909926209722, 136.989490880141 34.8908119011643, 136.989490187743 34.890492363454, 136.991398580678 34.8904542256673, 136.991954085751 34.8903953763069, 136.991962562252 34.8906312556586, 136.991983237978 34.8909683585448, 136.991980291656 34.8910582924668)) ^^http://www.opengis.net/ont/geosparql#wktLiteral