メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.7875000 35.0000000, 135.7937500 35.0000000, 135.7937500 35.0041667, 135.7875000 35.0041667, 135.7875000 35.0000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral