メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.71612222803 35.1813971484366, 136.713474754742 35.1810702483874, 136.712262791886 35.1809223670613, 136.712645110071 35.1788439797732, 136.713067555402 35.1788961152624, 136.713861147405 35.1789939938281, 136.715582911154 35.1792064270608, 136.71587350846 35.1803033450919, 136.71612222803 35.1813971484366)) ^^http://www.opengis.net/ont/geosparql#wktLiteral