メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.6250000 32.7708334, 132.6312500 32.7708334, 132.6312500 32.7750000, 132.6250000 32.7750000, 132.6250000 32.7708334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral