メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.5625000 33.7875000, 130.5687500 33.7875000, 130.5687500 33.7916667, 130.5625000 33.7916667, 130.5625000 33.7875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral