メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.3562500 40.9000000, 140.3625000 40.9000000, 140.3625000 40.9041667, 140.3562500 40.9041667, 140.3562500 40.9000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral