メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.7937500 32.4833333, 130.8000000 32.4833333, 130.8000000 32.4875000, 130.7937500 32.4875000, 130.7937500 32.4833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral