メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.1687500 33.8416667, 134.1750000 33.8416667, 134.1750000 33.8458334, 134.1687500 33.8458334, 134.1687500 33.8416667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral