メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((129.6750000 32.9416667, 129.6812500 32.9416667, 129.6812500 32.9458334, 129.6750000 32.9458334, 129.6750000 32.9416667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral