メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.689230359814 35.3168348318668, 136.688492821982 35.3174591183609, 136.68775350276 35.3168852237383, 136.686195698188 35.3157111304107, 136.686157634983 35.3156823182762, 136.686900872424 35.3150458861963, 136.68782474416 35.3157554361371, 136.689230359814 35.3168348318668)) ^^http://www.opengis.net/ont/geosparql#wktLiteral