メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.5562500 33.6250000, 135.5625000 33.6250000, 135.5625000 33.6291667, 135.5562500 33.6291667, 135.5562500 33.6250000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral