メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.909965784244 43.4979661463448, 141.909920015471 43.4978252869551, 141.909592270285 43.496706858626, 141.909654565522 43.4966919591, 141.91048301137 43.4965571828288, 141.910703812521 43.4972153917183, 141.910810057397 43.4975321057569, 141.910848818432 43.4976783946007, 141.910891144865 43.4978175907091, 141.909965784244 43.4979661463448)) ^^http://www.opengis.net/ont/geosparql#wktLiteral