メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.7875000 35.4833333, 134.7937500 35.4833333, 134.7937500 35.4875000, 134.7875000 35.4875000, 134.7875000 35.4833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral