メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.3562500 32.7958334, 130.3625000 32.7958334, 130.3625000 32.8000000, 130.3562500 32.8000000, 130.3562500 32.7958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral