メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.928574289664 35.1405863065202, 136.928525826857 35.1410438312654, 136.927443016789 35.1409739846731, 136.927476017668 35.1405285420729, 136.92752304837 35.1400718595689, 136.928619717433 35.1401405358432, 136.928574289664 35.1405863065202)) ^^http://www.opengis.net/ont/geosparql#wktLiteral