メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((129.1062500 32.9500000, 129.1125000 32.9500000, 129.1125000 32.9541667, 129.1062500 32.9541667, 129.1062500 32.9500000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral