メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.313473894224 43.0909606998357, 141.313117305395 43.091180932661, 141.312757356434 43.0913884772401, 141.312374352766 43.0916226263618, 141.311324169313 43.090647134154, 141.311696383402 43.0904282305373, 141.312056367593 43.0902181581832, 141.31244262308 43.0899968359249, 141.312694702727 43.0902425907983, 141.313119182066 43.0906171222993, 141.31317694068 43.0906680916169, 141.313473894224 43.0909606998357)) ^^http://www.opengis.net/ont/geosparql#wktLiteral