メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.6250000 32.7333333, 130.6312500 32.7333333, 130.6312500 32.7375000, 130.6250000 32.7375000, 130.6250000 32.7333333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral