メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.8000000 32.7833333, 130.8062500 32.7833333, 130.8062500 32.7875000, 130.8000000 32.7875000, 130.8000000 32.7833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral