メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.333795646794 43.7545577797454, 142.334535243144 43.7547800561296, 142.334527576455 43.7547941620929, 142.333921787581 43.7559091669313, 142.333177969463 43.7556830322809, 142.333165534125 43.7556795074677, 142.332609411092 43.7555216700281, 142.332475695622 43.7554794511789, 142.333178744618 43.7543681710335, 142.333795646794 43.7545577797454)) ^^http://www.opengis.net/ont/geosparql#wktLiteral