メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.122790611261 42.9754885120679, 144.121743035408 42.976904282182, 144.119610833986 42.9769056631654, 144.118640871438 42.9735810966997, 144.120021150275 42.9742063484654, 144.121619555895 42.9749615700334, 144.122790611261 42.9754885120679)) ^^http://www.opengis.net/ont/geosparql#wktLiteral