メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.2606656012 44.0230245381711, 144.259366882367 44.0226000671604, 144.259373117555 44.0218562543281, 144.260352748758 44.0219340839571, 144.261325181247 44.0220294824585, 144.261046404211 44.022453441303, 144.2606656012 44.0230245381711)) ^^http://www.opengis.net/ont/geosparql#wktLiteral