メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.871817612784 43.0131471782472, 142.871502756115 43.0129499936258, 142.87094777129 43.0126140839448, 142.871030851006 43.0125416872994, 142.87139798562 43.0122216003226, 142.871438077614 43.0121866402605, 142.872432915259 43.011319290914, 142.873123201717 43.0117529191255, 142.873216275928 43.011811489885, 142.87331740347 43.0118750102847, 142.871885624216 43.0130868183882, 142.871817612784 43.0131471782472)) ^^http://www.opengis.net/ont/geosparql#wktLiteral