メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.5250000 32.1416667, 130.5312500 32.1416667, 130.5312500 32.1458334, 130.5250000 32.1458334, 130.5250000 32.1416667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral