メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.38644849363 42.9861161411764, 144.38483580014 42.985834800605, 144.385024573834 42.9852448185332, 144.386637813868 42.9855258603516, 144.38644849363 42.9861161411764)) ^^http://www.opengis.net/ont/geosparql#wktLiteral